diff --git a/activation.cpp b/activation.cpp
index 331b189abd..7e09109d0d 100644
--- a/activation.cpp
+++ b/activation.cpp
@@ -646,7 +646,7 @@ Time Client::readUserCreationTime() const
     unsigned char *data = 0;
     KXErrorHandler handler; // ignore errors?
     status = XGetWindowProperty( QX11Info::display(), window(),
-        atoms->kde_net_wm_user_creation_time, 0, 10000, FALSE, XA_CARDINAL,
+        atoms->kde_net_wm_user_creation_time, 0, 10000, false, XA_CARDINAL,
         &type, &format, &nitems, &extra, &data );
     if (status  == Success )
         {
diff --git a/atoms.cpp b/atoms.cpp
index 059bb0704b..4807d04d4a 100644
--- a/atoms.cpp
+++ b/atoms.cpp
@@ -108,7 +108,7 @@ Atoms::Atoms()
     
     assert( n <= max );
 
-    XInternAtoms( QX11Info::display(), names, n, FALSE, atoms_return );
+    XInternAtoms( QX11Info::display(), names, n, false, atoms_return );
     for (int i = 0; i < n; i++ )
         *atoms[i] = atoms_return[i];
     }
diff --git a/client.cpp b/client.cpp
index d2e4eec3a1..5c3de48c8b 100644
--- a/client.cpp
+++ b/client.cpp
@@ -100,23 +100,23 @@ Client::Client( Workspace *ws )
     desk = 0; // no desktop yet
 
     mode = PositionCenter;
-    buttonDown = FALSE;
-    moveResizeMode = FALSE;
+    buttonDown = false;
+    moveResizeMode = false;
 
     info = NULL;
 
     shade_mode = ShadeNone;
-    active = FALSE;
+    active = false;
     deleting = false;
-    keep_above = FALSE;
-    keep_below = FALSE;
-    is_shape = FALSE;
+    keep_above = false;
+    keep_below = false;
+    is_shape = false;
     motif_noborder = false;
-    motif_may_move = TRUE;
-    motif_may_resize = TRUE;
-    motif_may_close = TRUE;
+    motif_may_move = true;
+    motif_may_resize = true;
+    motif_may_close = true;
     fullscreen_mode = FullScreenNone;
-    skip_taskbar = FALSE;
+    skip_taskbar = false;
     original_skip_taskbar = false;
     minimized = false;
     hidden = false;
@@ -134,8 +134,8 @@ Client::Client( Workspace *ws )
     Ptakeactivity = 0;
     Pcontexthelp = 0;
     Pping = 0;
-    input = FALSE;
-    skip_pager = FALSE;
+    input = false;
+    skip_pager = false;
 
     max_mode = MaximizeRestore;
     maxmode_restore = MaximizeRestore;
@@ -181,7 +181,7 @@ void Client::releaseWindow( bool on_shutdown )
     deleting = true;
     workspace()->discardUsedWindowRules( this, true ); // remove ForceTemporarily rules
     StackingUpdatesBlocker blocker( workspace());
-    if (!custom_opacity) setOpacity(FALSE);
+    if (!custom_opacity) setOpacity(false);
     if (moveResizeMode)
        leaveMoveResize();
     finishWindowRules();
@@ -390,7 +390,7 @@ void Client::detectShapable()
         case NET::Menu :
         case NET::Dialog :
         case NET::Utility :
-            setShapable(FALSE);
+            setShapable(false);
           break;
         default:
             assert( false );
@@ -454,7 +454,7 @@ void Client::setUserNoBorder( bool set )
 
 void Client::updateShape()
     {
-    setShapable(TRUE);
+    setShapable(true);
     if ( shape() )
     {
         XShapeCombineShape(QX11Info::display(), frameId(), ShapeBounding,
@@ -586,7 +586,7 @@ void Client::unminimize( bool avoid_animation )
     if( isOnCurrentDesktop() && isShown( true ))
         {
         if( mainClients().isEmpty() && !avoid_animation )
-            animateMinimizeOrUnminimize( FALSE );
+            animateMinimizeOrUnminimize( false );
         }
     updateVisibility();
     updateAllowedActions();
@@ -655,7 +655,7 @@ void Client::animateMinimizeOrUnminimize( bool minimize )
     float diff;
 
     QPainter p ( workspace()->desktopWidget() );
-    bool need_to_clear = FALSE;
+    bool need_to_clear = false;
     QPixmap pm3;
     do 
         {
@@ -667,12 +667,12 @@ void Client::animateMinimizeOrUnminimize( bool minimize )
             if ( need_to_clear ) 
                 {
                 p.drawPixmap( area2.x(), area2.y(), pm3 );
-                need_to_clear = FALSE;
+                need_to_clear = false;
                 }
             area2 = area;
             }
         XFlush(QX11Info::display());
-        XSync( QX11Info::display(), FALSE );
+        XSync( QX11Info::display(), false );
         diff = t.elapsed();
         if (diff > step)
             diff = step;
@@ -687,7 +687,7 @@ void Client::animateMinimizeOrUnminimize( bool minimize )
             else 
                 { // no overlap, we can clear later to avoid flicker
                 pm3 = pm2;
-                need_to_clear = TRUE;
+                need_to_clear = true;
                 }
             }
         } while ( t.elapsed() < step);
@@ -772,7 +772,7 @@ void Client::setShade( ShadeMode mode )
         XSelectInput( QX11Info::display(), wrapper, ClientWinMask | SubstructureNotifyMask );
         //as we hid the unmap event, xcompmgr didn't recognize the client wid has vanished, so we'll extra inform it        
         //done xcompmgr workaround
-// FRAME       repaint( FALSE );
+// FRAME       repaint( false );
 //        bool wasStaticContents = testWFlags( WStaticContents );
 //        setWFlags( WStaticContents );
         int step = qMax( 4, QABS( h - s.height() ) / as )+1;
@@ -813,7 +813,7 @@ void Client::setShade( ShadeMode mode )
             resizeDecoration( QSize( s.width(), h ));
             // assume a border
             // we do not have time to wait for X to send us paint events
-// FRAME           repaint( 0, h - step-5, width(), step+5, TRUE);
+// FRAME           repaint( 0, h - step-5, width(), step+5, true);
             QApplication::syncX();
             } while ( h < s.height() - step );
 //        if ( !wasStaticContents )
@@ -821,7 +821,7 @@ void Client::setShade( ShadeMode mode )
         shade_geometry_change = false;
         plainResize( s );
         if( shade_mode == ShadeHover || shade_mode == ShadeActivated )
-            setActive( TRUE );
+            setActive( true );
         XMapWindow( QX11Info::display(), wrapperId());
         XMapWindow( QX11Info::display(), window());
         XDeleteProperty (QX11Info::display(), client, atoms->net_wm_window_shade);
@@ -1419,10 +1419,10 @@ void Client::readIcons( Window win, QPixmap* icon, QPixmap* miniicon )
     {    
     // get the icons, allow scaling
     if( icon != NULL )
-        *icon = KWin::icon( win, 32, 32, TRUE, KWin::NETWM | KWin::WMHints );
+        *icon = KWin::icon( win, 32, 32, true, KWin::NETWM | KWin::WMHints );
     if( miniicon != NULL )
         if( icon == NULL || !icon->isNull())
-            *miniicon = KWin::icon( win, 16, 16, TRUE, KWin::NETWM | KWin::WMHints );
+            *miniicon = KWin::icon( win, 16, 16, true, KWin::NETWM | KWin::WMHints );
         else
             *miniicon = QPixmap();
     }
@@ -1449,8 +1449,8 @@ void Client::getIcons()
         }
     if( icon_pix.isNull())
         { // and if nothing else, load icon from classhint or xapp icon
-        icon_pix = KWin::icon( window(), 32, 32, TRUE, KWin::ClassHint | KWin::XApp );
-        miniicon_pix = KWin::icon( window(), 16, 16, TRUE, KWin::ClassHint | KWin::XApp );
+        icon_pix = KWin::icon( window(), 32, 32, true, KWin::ClassHint | KWin::XApp );
+        miniicon_pix = KWin::icon( window(), 16, 16, true, KWin::ClassHint | KWin::XApp );
         }
     if( isManaged() && decoration != NULL )
         decoration->iconChange();
@@ -1527,7 +1527,7 @@ Window Client::staticWmClientLeader(WId w)
     Window result = w;
     XErrorHandler oldHandler = XSetErrorHandler(nullErrorHandler);
     status = XGetWindowProperty( QX11Info::display(), w, atoms->wm_client_leader, 0, 10000,
-                                 FALSE, XA_WINDOW, &type, &format,
+                                 false, XA_WINDOW, &type, &format,
                                  &nitems, &extra, &data );
     XSetErrorHandler(oldHandler);
     if (status  == Success ) 
@@ -2012,9 +2012,9 @@ bool Client::getWindowOpacity() //query translucency settings from X, returns tr
         custom_opacity = true;
 //         setOpacity(opacity_ < 0xFFFFFFFF, opacity_);
         XFree ((char*)data);
-        return TRUE;
+        return true;
         }
-    return FALSE;
+    return false;
     }
     
 void Client::setCustomOpacityFlag(bool custom)
@@ -2036,14 +2036,14 @@ bool Client::touches(const Client* c)
 // checks if this client borders c, needed to test beep media player window state
     {
     if (y() == c->y() + c->height()) // this bottom to c
-        return TRUE;
+        return true;
     if (y() + height() == c->y()) // this top to c
-        return TRUE;
+        return true;
     if (x() == c->x() + c->width()) // this right to c
-        return TRUE;
+        return true;
     if (x() + width() == c->x()) // this left to c
-        return TRUE;
-    return FALSE;
+        return true;
+    return false;
     }
     
 void Client::setDecoHashProperty(uint topHeight, uint rightWidth, uint bottomHeight, uint leftWidth)
diff --git a/client.h b/client.h
index 6c2b6e2474..293ee915dc 100644
--- a/client.h
+++ b/client.h
@@ -684,7 +684,7 @@ inline bool Client::isOnAllDesktops() const
     }
 /*!
   Returns whether the client is on the virtual desktop \a d.
-  This is always TRUE for onAllDesktops clients.
+  This is always true for onAllDesktops clients.
  */
 inline bool Client::isOnDesktop( int d ) const
     {
diff --git a/data/update_window_settings.cpp b/data/update_window_settings.cpp
index 15e87996c8..dcff7a74b0 100644
--- a/data/update_window_settings.cpp
+++ b/data/update_window_settings.cpp
@@ -86,14 +86,14 @@ void loadFakeSessionInfo( KConfig* config )
         info->maximized = config->readEntry( QString("maximize")+n, 0 );
         info->fullscreen = config->readEntry( QString("fullscreen")+n, 0 );
         info->desktop = config->readEntry( QString("desktop")+n, 0 );
-        info->minimized = config->readEntry( QString("iconified")+n, FALSE );
-        info->onAllDesktops = config->readEntry( QString("sticky")+n, FALSE );
-        info->shaded = config->readEntry( QString("shaded")+n, FALSE );
-        info->keepAbove = config->readEntry( QString("staysOnTop")+n, FALSE  );
-        info->keepBelow = config->readEntry( QString("keepBelow")+n, FALSE  );
-        info->skipTaskbar = config->readEntry( QString("skipTaskbar")+n, FALSE  );
-        info->skipPager = config->readEntry( QString("skipPager")+n, FALSE  );
-        info->userNoBorder = config->readEntry( QString("userNoBorder")+n, FALSE  );
+        info->minimized = config->readEntry( QString("iconified")+n, false );
+        info->onAllDesktops = config->readEntry( QString("sticky")+n, false );
+        info->shaded = config->readEntry( QString("shaded")+n, false );
+        info->keepAbove = config->readEntry( QString("staysOnTop")+n, false  );
+        info->keepBelow = config->readEntry( QString("keepBelow")+n, false  );
+        info->skipTaskbar = config->readEntry( QString("skipTaskbar")+n, false  );
+        info->skipPager = config->readEntry( QString("skipPager")+n, false  );
+        info->userNoBorder = config->readEntry( QString("userNoBorder")+n, false  );
         info->windowType = txtToWindowType( config->readEntry( QString("windowType")+n, QString() ).latin1());
         info->active = false;
         info->fake = true;
diff --git a/events.cpp b/events.cpp
index 6594c2c305..57bca55346 100644
--- a/events.cpp
+++ b/events.cpp
@@ -194,14 +194,14 @@ bool Workspace::workspaceEvent( XEvent * e )
     {
     if ( mouse_emulation && (e->type == ButtonPress || e->type == ButtonRelease ) ) 
         {
-        mouse_emulation = FALSE;
+        mouse_emulation = false;
         XUngrabKeyboard( QX11Info::display(), QX11Info::appTime() );
         }
 
     if ( e->type == PropertyNotify || e->type == ClientMessage ) 
         {
         if ( netCheck( e ) )
-            return TRUE;
+            return true;
         }
 
     // events that should be handled before Clients can get them
@@ -215,7 +215,7 @@ bool Workspace::workspaceEvent( XEvent * e )
             if ( tab_grab || control_grab )
                 {
                 tab_box->handleMouseEvent( e );
-                return TRUE;
+                return true;
                 }
             break;
         case KeyPress:
@@ -316,7 +316,7 @@ bool Workspace::workspaceEvent( XEvent * e )
                         addSystemTrayWin( w );
                         }
                     }
-                return TRUE;
+                return true;
                 }
 
             return ( e->xunmap.event != e->xunmap.window ); // hide wm typical event from Qt
@@ -337,12 +337,12 @@ bool Workspace::workspaceEvent( XEvent * e )
             {
         //do not confuse Qt with these events. After all, _we_ are the
         //window manager who does the reparenting.
-            return TRUE;
+            return true;
             }
         case DestroyNotify:
             {
             if ( removeSystemTrayWin( e->xdestroywindow.window, false ) )
-                return TRUE;
+                return true;
             return false;
             }
         case MapRequest:
@@ -363,7 +363,7 @@ bool Workspace::workspaceEvent( XEvent * e )
 // this code doesn't check the parent to be root.
 //            if ( e->xmaprequest.parent == root ) { //###TODO store previously destroyed client ids
                 if ( addSystemTrayWin( e->xmaprequest.window ) )
-                    return TRUE;
+                    return true;
                 c = createClient( e->xmaprequest.window, false );
                 if ( c != NULL && root != QX11Info::appRootWindow() ) 
                     { // TODO what is this?
@@ -430,7 +430,7 @@ bool Workspace::workspaceEvent( XEvent * e )
             break;
         case KeyRelease:
             if ( mouse_emulation )
-                return FALSE;
+                return false;
             break;
         case FocusIn:
             if( e->xfocus.window == rootWin()
@@ -466,7 +466,7 @@ bool Workspace::workspaceEvent( XEvent * e )
         default:
             break;
         }
-    return FALSE;
+    return false;
     }
 
 // Some events don't have the actual window which caused the event
@@ -752,7 +752,7 @@ void Client::destroyNotifyEvent( XDestroyWindowEvent* e )
     }
     
     
-bool         blockAnimation = FALSE;
+bool         blockAnimation = false;
 
 /*!
    Handles client messages for the client window
@@ -901,7 +901,7 @@ void Client::enterNotifyEvent( XCrossingEvent* e )
             delete shadeHoverTimer;
             shadeHoverTimer = new QTimer( this );
             connect( shadeHoverTimer, SIGNAL( timeout() ), this, SLOT( shadeHover() ));
-            shadeHoverTimer->start( options->shadeHoverInterval, TRUE );
+            shadeHoverTimer->start( options->shadeHoverInterval, true );
             }
 
         if ( options->focusPolicy == Options::ClickToFocus )
@@ -914,7 +914,7 @@ void Client::enterNotifyEvent( XCrossingEvent* e )
             delete autoRaiseTimer;
             autoRaiseTimer = new QTimer( this );
             connect( autoRaiseTimer, SIGNAL( timeout() ), this, SLOT( autoRaise() ) );
-            autoRaiseTimer->start( options->autoRaiseInterval, TRUE  );
+            autoRaiseTimer->start( options->autoRaiseInterval, true  );
             }
 
         if ( options->focusPolicy !=  Options::FocusStrictlyUnderMouse && ( isDesktop() || isDock() || isTopMenu() ) )
@@ -987,7 +987,7 @@ void Client::grabButton( int modifier )
          ++i )
         XGrabButton( QX11Info::display(), AnyButton,
             modifier | mods[ i ],
-            wrapperId(),  FALSE, ButtonPressMask,
+            wrapperId(),  false, ButtonPressMask,
             GrabModeSync, GrabModeAsync, None, None );
     }
 
@@ -1041,7 +1041,7 @@ void Client::updateMouseGrab()
         {
         XUngrabButton( QX11Info::display(), AnyButton, AnyModifier, wrapperId());
         // simply grab all modifier combinations
-        XGrabButton(QX11Info::display(), AnyButton, AnyModifier, wrapperId(), FALSE,
+        XGrabButton(QX11Info::display(), AnyButton, AnyModifier, wrapperId(), false,
             ButtonPressMask,
             GrabModeSync, GrabModeAsync,
             None, None );
@@ -1212,7 +1212,7 @@ bool Client::buttonPressEvent( Window w, int button, int state, int x, int y, in
             bool replay = performMouseCommand( com, QPoint( x_root, y_root), perform_handled );
 
             if ( isSpecialWindow())
-                replay = TRUE;
+                replay = true;
 
             if( w == wrapperId()) // these can come only from a grab
                 XAllowEvents(QX11Info::display(), replay? ReplayPointer : SyncPointer, CurrentTime ); //QX11Info::appTime());
@@ -1240,7 +1240,7 @@ void Client::processDecorationButtonPress( int button, int /*state*/, int x, int
     Options::MouseCommand com = Options::MouseNothing;
     bool active = isActive();
     if ( !wantsInput() ) // we cannot be active, use it anyway
-        active = TRUE;
+        active = true;
 
     if ( button == Button1 )
         com = active ? options->commandActiveTitlebar1() : options->commandInactiveTitlebar1();
@@ -1253,7 +1253,7 @@ void Client::processDecorationButtonPress( int button, int /*state*/, int x, int
         && com != Options::MouseMinimize )  // mouse release event
         {
         mode = mousePosition( QPoint( x, y ));
-        buttonDown = TRUE;
+        buttonDown = true;
         moveOffset = QPoint( x, y );
         invertedMoveOffset = rect().bottomRight() - moveOffset;
         unrestrictedMoveResize = false;
@@ -1304,7 +1304,7 @@ bool Client::buttonReleaseEvent( Window w, int /*button*/, int state, int x, int
     y = this->y();
     if ( (state & ( Button1Mask & Button2Mask & Button3Mask )) == 0 )
         {
-        buttonDown = FALSE;
+        buttonDown = false;
         if ( moveResizeMode ) 
             {
             finishMoveResize( false );
@@ -1391,7 +1391,7 @@ void Client::focusInEvent( XFocusInEvent* e )
     bool activate =  workspace()->allowClientActivation( this, -1U, true );
     workspace()->gotFocusIn( this ); // remove from should_get_focus list
     if( activate )
-        setActive( TRUE );
+        setActive( true );
     else
         {
         workspace()->restoreFocus();
@@ -1460,7 +1460,7 @@ void Client::focusOutEvent( XFocusOutEvent* e )
     if ( QApplication::activePopupWidget() )
         return;
     if( !check_follows_focusin( this ))
-        setActive( FALSE );
+        setActive( false );
     }
 
 void Client::visibilityNotifyEvent( XVisibilityEvent * e)
@@ -1482,7 +1482,7 @@ void Client::NETMoveResize( int x_root, int y_root, NET::Direction direction )
     else if( moveResizeMode && direction == NET::MoveResizeCancel)
     {
         finishMoveResize( true );
-        buttonDown = FALSE;
+        buttonDown = false;
         setCursor( mode );
     }
     else if( direction >= NET::TopLeft && direction <= NET::Left ) 
@@ -1502,7 +1502,7 @@ void Client::NETMoveResize( int x_root, int y_root, NET::Direction direction )
             return;
         if( moveResizeMode )
             finishMoveResize( false );
-        buttonDown = TRUE;
+        buttonDown = true;
         moveOffset = QPoint( x_root - x(), y_root - y()); // map from global
         invertedMoveOffset = rect().bottomRight() - moveOffset;
         unrestrictedMoveResize = false;
@@ -1554,12 +1554,12 @@ void Client::keyPressEvent( uint key_code )
 		case Qt::Key_Return:
 		case Qt::Key_Enter:
             finishMoveResize( false );
-            buttonDown = FALSE;
+            buttonDown = false;
             setCursor( mode );
             break;
 		case Qt::Key_Escape:
             finishMoveResize( true );
-            buttonDown = FALSE;
+            buttonDown = false;
             setCursor( mode );
             break;
         default:
diff --git a/geometry.cpp b/geometry.cpp
index 11105894bf..031313415e 100644
--- a/geometry.cpp
+++ b/geometry.cpp
@@ -1292,7 +1292,7 @@ void Client::sendSyntheticConfigureNotify()
     c.border_width = 0;
     c.above = None;
     c.override_redirect = 0;
-    XSendEvent( QX11Info::display(), c.event, TRUE, StructureNotifyMask, (XEvent*)&c );
+    XSendEvent( QX11Info::display(), c.event, true, StructureNotifyMask, (XEvent*)&c );
     }
 
 const QPoint Client::calculateGravitation( bool invert, int gravity ) const
@@ -1593,7 +1593,7 @@ bool Client::isMaximizable() const
             return false;
         }
     if ( maximizeMode() != MaximizeRestore )
-        return TRUE;
+        return true;
     QSize max = maxSize();
 #if 0
     if( max.width() < 32767 || max.height() < 32767 ) // sizes are 16bit with X
diff --git a/kcmkwin/kwindecoration/buttons.cpp b/kcmkwin/kwindecoration/buttons.cpp
index e3234e220b..04358408ed 100644
--- a/kcmkwin/kwindecoration/buttons.cpp
+++ b/kcmkwin/kwindecoration/buttons.cpp
@@ -94,9 +94,9 @@ bool ButtonDrag::decode( QDropEvent* e, Button& btn )
 		int supported;
 		stream >> supported;
 		btn.supported = supported;
-		return TRUE;
+		return true;
 	}
-	return FALSE;
+	return false;
 }
 
 
@@ -278,7 +278,7 @@ ButtonDropSite::ButtonDropSite( QWidget* parent, const char* name )
 	  m_selected(0)
 {
 	setObjectName( name );
-	setAcceptDrops( TRUE );
+	setAcceptDrops( true );
 	setFrameShape( WinPanel );
 	setFrameShadow( Raised );
 	setMinimumHeight( 26 );
diff --git a/kcmkwin/kwinoptions/windows.cpp b/kcmkwin/kwinoptions/windows.cpp
index 5e84256511..baf1299713 100644
--- a/kcmkwin/kwinoptions/windows.cpp
+++ b/kcmkwin/kwinoptions/windows.cpp
@@ -1202,7 +1202,7 @@ KTranslucencyConfig::KTranslucencyConfig (bool _standAlone, KConfig *_config, KI
     : KCModule(inst, parent), config(_config), standAlone(_standAlone)
 {
   kompmgr = 0L;
-  resetKompmgr_ = FALSE;
+  resetKompmgr_ = false;
   QVBoxLayout *lay = new QVBoxLayout (this);
   kompmgrAvailable_ = kompmgrAvailable();
   if (!kompmgrAvailable_){
@@ -1274,7 +1274,7 @@ KTranslucencyConfig::KTranslucencyConfig (bool _standAlone, KConfig *_config, KI
   tabW->addTab(tGroup, i18n("Opacity"));
 
   QWidget *sGroup = new QWidget(tabW);
-//   sGroup->setCheckable(TRUE);
+//   sGroup->setCheckable(true);
   QVBoxLayout *vLay2 = new QVBoxLayout (sGroup,11,6);
   vLay2->addSpacing(11); // to get the proper gb top offset
   useShadows = new QCheckBox(i18n("Use shadows"),sGroup);
@@ -1421,7 +1421,7 @@ KTranslucencyConfig::KTranslucencyConfig (bool _standAlone, KConfig *_config, KI
 
 void KTranslucencyConfig::resetKompmgr()
 {
-    resetKompmgr_ = TRUE;
+    resetKompmgr_ = true;
 }
 void KTranslucencyConfig::load( void )
 {
@@ -1459,7 +1459,7 @@ void KTranslucencyConfig::load( void )
   KConfig conf_(QDir::homePath() + "/.xcompmgrrc");
   conf_.setGroup("xcompmgr");
   
-  disableARGB->setChecked(conf_.readEntry("DisableARGB", QVariant(FALSE)).toBool());
+  disableARGB->setChecked(conf_.readEntry("DisableARGB", QVariant(false)).toBool());
 
   useShadows->setChecked(conf_.readEntry("Compmode","CompClientShadows").compare("CompClientShadows") == 0);
   shadowTopOffset->setValue(-1*(conf_.readEntry("ShadowOffsetY",-80)));
@@ -1479,8 +1479,8 @@ void KTranslucencyConfig::load( void )
   else
     shadowColor->setColor(QColor(r,g,b));
 
-  fadeInWindows->setChecked(conf_.readEntry("FadeWindows", QVariant(TRUE)).toBool());
-  fadeOnOpacityChange->setChecked(conf_.readEntry("FadeTrans", QVariant(FALSE)).toBool());
+  fadeInWindows->setChecked(conf_.readEntry("FadeWindows", QVariant(true)).toBool());
+  fadeOnOpacityChange->setChecked(conf_.readEntry("FadeTrans", QVariant(false)).toBool());
   fadeInSpeed->setValue((int)(conf_.readEntry("FadeInStep",0.020)*1000.0));
   fadeOutSpeed->setValue((int)(conf_.readEntry("FadeOutStep",0.070)*1000.0));
 
@@ -1579,12 +1579,12 @@ void KTranslucencyConfig::defaults()
   inactiveWindowOpacity->setEnabled(true);
   movingWindowOpacity->setEnabled(false);
   dockWindowOpacity->setEnabled(true);
-  useShadows->setChecked(TRUE);
-  removeShadowsOnMove->setChecked(FALSE);
-  removeShadowsOnResize->setChecked(FALSE);
+  useShadows->setChecked(true);
+  removeShadowsOnMove->setChecked(false);
+  removeShadowsOnResize->setChecked(false);
   shadowColor->setColor(Qt::black);
-  fadeInWindows->setChecked(TRUE);
-  fadeOnOpacityChange->setChecked(FALSE);
+  fadeInWindows->setChecked(true);
+  fadeOnOpacityChange->setChecked(false);
   fadeInSpeed->setValue(70);
   fadeOutSpeed->setValue(20);
   emit KCModule::changed(true);
diff --git a/killwindow.cpp b/killwindow.cpp
index 65ff98f0cb..765654793d 100644
--- a/killwindow.cpp
+++ b/killwindow.cpp
@@ -84,7 +84,7 @@ void KillWindow::start()
                 button_released = (ev.xbutton.button == Button1);
                 if ( ev.xbutton.button == Button3 ) 
                     {
-                    escape_pressed = TRUE;
+                    escape_pressed = true;
                     break;
                     }
                 workspace->killWindowId(ev.xbutton.subwindow);
diff --git a/main.cpp b/main.cpp
index d9c54cc86e..8550079684 100644
--- a/main.cpp
+++ b/main.cpp
@@ -44,13 +44,13 @@ Atoms* atoms;
 
 int screen_number = -1;
 
-static bool initting = FALSE;
+static bool initting = false;
 
 static
 int x11ErrorHandler(Display *d, XErrorEvent *e)
     {
     char msg[80], req[80], number[80];
-    bool ignore_badwindow = TRUE; //maybe temporary
+    bool ignore_badwindow = true; //maybe temporary
 
     if (initting &&
         (
@@ -104,7 +104,7 @@ Application::Application( )
     // if there was already kwin running, it saved its configuration after loosing the selection -> reread
     config->reparseConfiguration();
 
-    initting = TRUE; // startup....
+    initting = true; // startup....
 
     // install X11 error handler
     XSetErrorHandler( x11ErrorHandler );
@@ -121,7 +121,7 @@ Application::Application( )
 
     syncX(); // trigger possible errors, there's still a chance to abort
 
-    initting = FALSE; // startup done, we are up and running now.
+    initting = false; // startup done, we are up and running now.
        
     dcopClient()->send( "ksplash", "", "upAndRunning(QString)", QString("wm started"));
     XEvent e;
@@ -153,7 +153,7 @@ void Application::lostSelection()
 bool Application::x11EventFilter( XEvent *e )
     {
     if ( Workspace::self()->workspaceEvent( e ) )
-             return TRUE;
+             return true;
     return KApplication::x11EventFilter( e );
     }
     
diff --git a/manage.cpp b/manage.cpp
index 8f9e5c9fbd..4f5be79a84 100644
--- a/manage.cpp
+++ b/manage.cpp
@@ -191,7 +191,7 @@ bool Client::manage( Window w, bool isMapped )
 //    onAllDesktopsChange(); decoration doesn't exist here yet
 
     QRect geom( attr.x, attr.y, attr.width, attr.height );
-    bool placementDone = FALSE;
+    bool placementDone = false;
 
     if ( session )
         geom = session->geometry;
@@ -258,7 +258,7 @@ bool Client::manage( Window w, bool isMapped )
         if ( ( (xSizeHint.flags & PPosition) && !ignorePPosition ) ||
              (xSizeHint.flags & USPosition) ) 
             {
-            placementDone = TRUE;
+            placementDone = true;
             // disobey xinerama placement option for now (#70943)
             area = workspace()->clientArea( PlacementArea, geom.center(), desktop());
             }
@@ -279,7 +279,7 @@ bool Client::manage( Window w, bool isMapped )
     if( isMovable())
         {
         if( geom.x() > area.right() || geom.y() > area.bottom())
-            placementDone = FALSE; // weird, do not trust.
+            placementDone = false; // weird, do not trust.
         }
 
     if ( placementDone )
@@ -301,7 +301,7 @@ bool Client::manage( Window w, bool isMapped )
     if( !placementDone ) 
         { // placement needs to be after setting size
         workspace()->place( this, area );
-        placementDone = TRUE;
+        placementDone = true;
         }
 
     if(( !isSpecialWindow() || isToolbar()) && isMovable())
@@ -313,7 +313,7 @@ bool Client::manage( Window w, bool isMapped )
         updateShape();
         }
 //    else
-//	setShapable(FALSE);
+//	setShapable(false);
 	
     //CT extra check for stupid jdk 1.3.1. But should make sense in general
     // if client has initial state set to Iconic and is transient with a parent
@@ -335,7 +335,7 @@ bool Client::manage( Window w, bool isMapped )
     // probably should be replaced by something better
     bool doNotShow = false;
     if ( workspace()->isNotManaged( caption() ) )
-        doNotShow = TRUE;
+        doNotShow = true;
 
     // other settings from the previous session
     if ( session ) 
diff --git a/notifications.cpp b/notifications.cpp
index 70a0d307bf..287b1153ce 100644
--- a/notifications.cpp
+++ b/notifications.cpp
@@ -92,7 +92,7 @@ QString Notify::eventToName( Event e )
     return event;
     }
 
-static bool forgetIt = FALSE;
+static bool forgetIt = false;
 QList< Notify::EventData > Notify::pending_events;
 
 bool Notify::raise( Event e, const QString& message, Client* c )
diff --git a/options.cpp b/options.cpp
index e0ad26222c..ca9eafaa48 100644
--- a/options.cpp
+++ b/options.cpp
@@ -72,7 +72,7 @@ unsigned long Options::updateSettings()
     if ( val == "CDE" )
         altTabStyle = CDE;
 
-    rollOverDesktops = config->readEntry("RollOverDesktops", QVariant(TRUE)).toBool();
+    rollOverDesktops = config->readEntry("RollOverDesktops", QVariant(true)).toBool();
     
 //    focusStealingPreventionLevel = config->readEntry( "FocusStealingPreventionLevel", 2 );
     // TODO use low level for now
@@ -101,9 +101,9 @@ unsigned long Options::updateSettings()
 
     placement = Placement::policyFromString( config->readEntry("Placement"), true );
 
-    animateShade = config->readEntry("AnimateShade", QVariant(TRUE )).toBool();
+    animateShade = config->readEntry("AnimateShade", QVariant(true)).toBool();
 
-    animateMinimize = config->readEntry("AnimateMinimize", QVariant(TRUE )).toBool();
+    animateMinimize = config->readEntry("AnimateMinimize", QVariant(true)).toBool();
     animateMinimizeSpeed = config->readEntry("AnimateMinimizeSpeed", 5 );
 
     if( focusPolicy == ClickToFocus ) 
@@ -115,21 +115,21 @@ unsigned long Options::updateSettings()
         }
     else 
         {
-        autoRaise = config->readEntry("AutoRaise", QVariant(FALSE )).toBool();
+        autoRaise = config->readEntry("AutoRaise", QVariant(false)).toBool();
         autoRaiseInterval = config->readEntry("AutoRaiseInterval", 0 );
-        delayFocus = config->readEntry("DelayFocus", QVariant(FALSE )).toBool();
+        delayFocus = config->readEntry("DelayFocus", QVariant(false)).toBool();
         delayFocusInterval = config->readEntry("DelayFocusInterval", 0 );
         }
 
-    shadeHover = config->readEntry("ShadeHover", QVariant(FALSE )).toBool();
+    shadeHover = config->readEntry("ShadeHover", QVariant(false)).toBool();
     shadeHoverInterval = config->readEntry("ShadeHoverInterval", 250 );
 
     // important: autoRaise implies ClickRaise
-    clickRaise = autoRaise || config->readEntry("ClickRaise", QVariant(TRUE )).toBool();
+    clickRaise = autoRaise || config->readEntry("ClickRaise", QVariant(true)).toBool();
 
     borderSnapZone = config->readEntry("BorderSnapZone", 10);
     windowSnapZone = config->readEntry("WindowSnapZone", 10);
-    snapOnlyWhenOverlapping=config->readEntry("SnapOnlyWhenOverlapping", QVariant(FALSE)).toBool();
+    snapOnlyWhenOverlapping=config->readEntry("SnapOnlyWhenOverlapping", QVariant(false)).toBool();
     electric_borders = config->readEntry("ElectricBorders", 0);
     electric_border_delay = config->readEntry("ElectricBorderDelay", 150);
 
@@ -152,7 +152,7 @@ unsigned long Options::updateSettings()
         (*it) = (*it).lower();
 
     killPingTimeout = config->readEntry( "KillPingTimeout", 5000 );
-    hideUtilityWindowsForInactive = config->readEntry( "HideUtilityWindowsForInactive", QVariant( true )).toBool();
+    hideUtilityWindowsForInactive = config->readEntry( "HideUtilityWindowsForInactive", QVariant( true)).toBool();
 
     // Mouse bindings
     config->setGroup( "MouseBindings");
@@ -194,7 +194,7 @@ unsigned long Options::updateSettings()
     removeShadowsOnResize = config->readEntry("RemoveShadowsOnResize", QVariant(true)).toBool();
     onlyDecoTranslucent = config->readEntry("OnlyDecoTranslucent", QVariant(false)).toBool();
     if (resetKompmgr = config->readEntry("ResetKompmgr", QVariant(false)).toBool())
-        config->writeEntry("ResetKompmgr",FALSE);
+        config->writeEntry("ResetKompmgr",false);
     
     
     
@@ -204,11 +204,11 @@ unsigned long Options::updateSettings()
     // "EffectNoTooltip" setting from kdeglobals.
     KConfig globalConfig("kdeglobals");
     globalConfig.setGroup("KDE");
-    topmenus = globalConfig.readEntry( "macStyle", QVariant(false )).toBool();
+    topmenus = globalConfig.readEntry( "macStyle", QVariant(false)).toBool();
 
     KConfig kdesktopcfg( "kdesktoprc", true );
     kdesktopcfg.setGroup( "Menubar" );
-    desktop_topmenu = kdesktopcfg.readEntry( "ShowMenubar", QVariant(false )).toBool();
+    desktop_topmenu = kdesktopcfg.readEntry( "ShowMenubar", QVariant(false)).toBool();
     if( desktop_topmenu )
         topmenus = true;
 
diff --git a/popupinfo.cpp b/popupinfo.cpp
index 848ce64434..af08206ea2 100644
--- a/popupinfo.cpp
+++ b/popupinfo.cpp
@@ -45,7 +45,7 @@ PopupInfo::PopupInfo( const char *name )
     connect(&m_delayedHideTimer, SIGNAL(timeout()), this, SLOT(hide()));
 
     QFont f = font();
-    f.setBold( TRUE );
+    f.setBold( true );
     f.setPointSize( 14 );
     setFont( f );
 
diff --git a/sm.cpp b/sm.cpp
index 2b0efb6349..05eb680be5 100644
--- a/sm.cpp
+++ b/sm.cpp
@@ -94,7 +94,7 @@ void Workspace::storeSession( KConfig* config, SMSavePhase phase )
             config->writeEntry( QString("wmClientMachine")+n, c->wmClientMachine( true ).constData() );
             config->writeEntry( QString("resourceName")+n, c->resourceName().constData() );
             config->writeEntry( QString("resourceClass")+n, c->resourceClass().constData() );
-            config->writeEntry( QString("geometry")+n,  QRect( c->calculateGravitation(TRUE), c->clientSize() ) ); // FRAME
+            config->writeEntry( QString("geometry")+n,  QRect( c->calculateGravitation(true), c->clientSize() ) ); // FRAME
             config->writeEntry( QString("restore")+n, c->geometryRestore() );
             config->writeEntry( QString("fsrestore")+n, c->geometryFSRestore() );
             config->writeEntry( QString("maximize")+n, (int) c->maximizeMode() );
@@ -169,14 +169,14 @@ void Workspace::loadSessionInfo()
         info->maximized = config->readEntry( QString("maximize")+n, 0 );
         info->fullscreen = config->readEntry( QString("fullscreen")+n, 0 );
         info->desktop = config->readEntry( QString("desktop")+n, 0 );
-        info->minimized = config->readEntry( QString("iconified")+n, FALSE );
-        info->onAllDesktops = config->readEntry( QString("sticky")+n, FALSE );
-        info->shaded = config->readEntry( QString("shaded")+n, FALSE );
-        info->keepAbove = config->readEntry( QString("staysOnTop")+n, FALSE  );
-        info->keepBelow = config->readEntry( QString("keepBelow")+n, FALSE  );
-        info->skipTaskbar = config->readEntry( QString("skipTaskbar")+n, FALSE  );
-        info->skipPager = config->readEntry( QString("skipPager")+n, FALSE  );
-        info->userNoBorder = config->readEntry( QString("userNoBorder")+n, FALSE  );
+        info->minimized = config->readEntry( QString("iconified")+n, false );
+        info->onAllDesktops = config->readEntry( QString("sticky")+n, false );
+        info->shaded = config->readEntry( QString("shaded")+n, false );
+        info->keepAbove = config->readEntry( QString("staysOnTop")+n, false  );
+        info->keepBelow = config->readEntry( QString("keepBelow")+n, false  );
+        info->skipTaskbar = config->readEntry( QString("skipTaskbar")+n, false  );
+        info->skipPager = config->readEntry( QString("skipPager")+n, false  );
+        info->userNoBorder = config->readEntry( QString("userNoBorder")+n, false  );
         info->windowType = txtToWindowType( config->readEntry( QString("windowType")+n, QString() ).latin1());
         info->shortcut = config->readEntry( QString("shortcut")+n, QString() );
         info->active = ( active_client == i );
diff --git a/tabbox.cpp b/tabbox.cpp
index 329b7a6c60..c75cd058ad 100644
--- a/tabbox.cpp
+++ b/tabbox.cpp
@@ -164,7 +164,7 @@ void TabBox::reset()
         if ( clients.count() == 0 )  // height for the "not tasks" text
           {
           QFont f = font();
-          f.setBold( TRUE );
+          f.setBold( true );
           f.setPointSize( 14 );
 
           h = QFontMetrics(f).height()*4;
@@ -342,7 +342,7 @@ void TabBox::drawContents( QPainter * )
         if ( !currentClient() )
             {
             QFont f = font();
-            f.setBold( TRUE );
+            f.setBold( true );
             f.setPointSize( 14 );
 
             p.setFont(f);
@@ -877,26 +877,26 @@ bool Workspace::startKDEWalkThroughWindows()
     {
     if( !establishTabBoxGrab())
         return false;
-    tab_grab        = TRUE;
+    tab_grab        = true;
     keys->setEnabled( false );
     disable_shortcuts_keys->setEnabled( false );
     client_keys->setEnabled( false );
     tab_box->setMode( TabBox::WindowsMode );
     tab_box->reset();
-    return TRUE;
+    return true;
     }
 
 bool Workspace::startWalkThroughDesktops( int mode )
     {
     if( !establishTabBoxGrab())
         return false;
-    control_grab = TRUE;
+    control_grab = true;
     keys->setEnabled( false );
     disable_shortcuts_keys->setEnabled( false );
     client_keys->setEnabled( false );
     tab_box->setMode( (TabBox::Mode) mode );
     tab_box->reset();
-    return TRUE;
+    return true;
     }
 
 bool Workspace::startWalkThroughDesktops()
@@ -1048,8 +1048,8 @@ void Workspace::closeTabBox()
     keys->setEnabled( true );
     disable_shortcuts_keys->setEnabled( true );
     client_keys->setEnabled( true );
-    tab_grab = FALSE;
-    control_grab = FALSE;
+    tab_grab = false;
+    control_grab = false;
     }
 
 /*!
@@ -1212,7 +1212,7 @@ Client* Workspace::previousStaticClient( Client* c ) const
 
 bool Workspace::establishTabBoxGrab()
     {
-    if( XGrabKeyboard( QX11Info::display(), root, FALSE,
+    if( XGrabKeyboard( QX11Info::display(), root, false,
         GrabModeAsync, GrabModeAsync, QX11Info::appTime()) != GrabSuccess )
         return false;
     // Don't try to establish a global mouse grab using XGrabPointer, as that would prevent
diff --git a/tabbox.h b/tabbox.h
index ac9e077bf5..d9eaa74376 100644
--- a/tabbox.h
+++ b/tabbox.h
@@ -42,7 +42,7 @@ class TabBox : public Q3Frame
         Mode mode() const;
 
         void reset();
-        void nextPrev( bool next = TRUE);
+        void nextPrev( bool next = true);
 
         void delayedShow();
         void hide();
diff --git a/useractions.cpp b/useractions.cpp
index 0f022321c1..17339da3a3 100644
--- a/useractions.cpp
+++ b/useractions.cpp
@@ -208,7 +208,7 @@ void Workspace::desktopPopupAboutToShow()
     desk_popup->clear();
     desk_popup->insertItem( i18n("&All Desktops"), 0 );
     if ( active_popup_client && active_popup_client->isOnAllDesktops() )
-        desk_popup->setItemChecked( 0, TRUE );
+        desk_popup->setItemChecked( 0, true );
     desk_popup->insertSeparator( -1 );
     int id;
     const int BASE = 10;
@@ -226,7 +226,7 @@ void Workspace::desktopPopupAboutToShow()
                 i );
         if ( active_popup_client &&
              !active_popup_client->isOnAllDesktops() && active_popup_client->desktop()  == i )
-            desk_popup->setItemChecked( id, TRUE );
+            desk_popup->setItemChecked( id, true );
         }
     }
 
@@ -447,7 +447,7 @@ void Workspace::performWindowOperation( Client* c, Options::WindowOperation op )
  */
 bool Client::performMouseCommand( Options::MouseCommand command, QPoint globalPos, bool handled )
     {
-    bool replay = FALSE;
+    bool replay = false;
     switch (command) 
         {
         case Options::MouseRaise:
@@ -490,11 +490,11 @@ bool Client::performMouseCommand( Options::MouseCommand command, QPoint globalPo
             break;
         case Options::MouseActivateRaiseAndPassClick:
             workspace()->takeActivity( this, ActivityFocus | ActivityRaise, handled );
-            replay = TRUE;
+            replay = true;
             break;
         case Options::MouseActivateAndPassClick:
             workspace()->takeActivity( this, ActivityFocus, handled );
-            replay = TRUE;
+            replay = true;
             break;
         case Options::MouseActivateRaiseAndMove:
         case Options::MouseActivateRaiseAndUnrestrictedMove:
@@ -511,7 +511,7 @@ bool Client::performMouseCommand( Options::MouseCommand command, QPoint globalPo
             if( moveResizeMode )
                 finishMoveResize( false );
             mode = PositionCenter;
-            buttonDown = TRUE;
+            buttonDown = true;
             moveOffset = QPoint( globalPos.x() - x(), globalPos.y() - y()); // map from global
             invertedMoveOffset = rect().bottomRight() - moveOffset;
             unrestrictedMoveResize = ( command == Options::MouseActivateRaiseAndUnrestrictedMove
@@ -531,7 +531,7 @@ bool Client::performMouseCommand( Options::MouseCommand command, QPoint globalPo
                 break;
             if( moveResizeMode )
                 finishMoveResize( false );
-            buttonDown = TRUE;
+            buttonDown = true;
             moveOffset = QPoint( globalPos.x() - x(), globalPos.y() - y()); // map from global
             int x = moveOffset.x(), y = moveOffset.y();
             bool left = x < width() / 3;
@@ -592,12 +592,12 @@ bool Client::performMouseCommand( Options::MouseCommand command, QPoint globalPo
                 {
                 if (opacity_ < 0xF3333333)
                     {
-                    setOpacity(TRUE, opacity_ + 0xCCCCCCC);
+                    setOpacity(true, opacity_ + 0xCCCCCCC);
                     custom_opacity = true;
                     }
                 else
                     {
-                    setOpacity(FALSE, 0xFFFFFFFF);
+                    setOpacity(false, 0xFFFFFFFF);
                     custom_opacity = false;
                     }
                 }
@@ -605,12 +605,12 @@ bool Client::performMouseCommand( Options::MouseCommand command, QPoint globalPo
         case Options::MouseOpacityLess:
             if (opacity_ > 0)
                 {
-                setOpacity(TRUE, (opacity_ > 0xCCCCCCC) ? opacity_ - 0xCCCCCCC : 0);
+                setOpacity(true, (opacity_ > 0xCCCCCCC) ? opacity_ - 0xCCCCCCC : 0);
                 custom_opacity = true;
                 }
             break;
         case Options::MouseNothing:
-            replay = TRUE;
+            replay = true;
             break;
         }
     return replay;
diff --git a/utils.cpp b/utils.cpp
index a5143e04ef..11d794a732 100644
--- a/utils.cpp
+++ b/utils.cpp
@@ -54,7 +54,7 @@ bool Shape::hasShape( WId w)
     unsigned int wws, hws, wbs, hbs;
     int boundingShaped = 0, clipShaped = 0;
     if (!kwin_has_shape)
-        return FALSE;
+        return false;
     XShapeQueryExtents(QX11Info::display(), w,
                        &boundingShaped, &xws, &yws, &wws, &hws,
                        &clipShaped, &xbs, &ybs, &wbs, &hbs);
@@ -82,7 +82,7 @@ void Motif::readFlags( WId w, bool& noborder, bool& resize, bool& move,
     unsigned char* data;
     MwmHints* hints = 0;
     if ( XGetWindowProperty( QX11Info::display(), w, atoms->motif_wm_hints, 0, 5,
-                             FALSE, atoms->motif_wm_hints, &type, &format,
+                             false, atoms->motif_wm_hints, &type, &format,
                              &length, &after, &data ) == Success ) 
         {
         if ( data )
@@ -188,7 +188,7 @@ QByteArray getStringProperty(WId w, Atom prop, char separator)
     QByteArray result = "";
     KXErrorHandler handler; // ignore errors
     status = XGetWindowProperty( QX11Info::display(), w, prop, 0, 10000,
-                                 FALSE, XA_STRING, &type, &format,
+                                 false, XA_STRING, &type, &format,
                                  &nitems, &extra, &data );
     if ( status == Success) 
         {
diff --git a/workspace.cpp b/workspace.cpp
index de18c6029d..20a1dc7de4 100644
--- a/workspace.cpp
+++ b/workspace.cpp
@@ -59,7 +59,7 @@ Workspace *Workspace::_self = 0;
 
 KProcess* kompmgr = 0;
 
-bool allowKompmgrRestart = TRUE;
+bool allowKompmgrRestart = true;
 
 // Rikkus: This class is too complex. It needs splitting further.
 // It's a nightmare to understand, especially with so few comments :(
@@ -994,10 +994,10 @@ bool Workspace::isNotManaged( const QString& title )
         if (r.search(title) != -1) 
             {
             doNotManageList.remove( it );
-            return TRUE;
+            return true;
             }
         }
-    return FALSE;
+    return false;
     }
 
 /*!
@@ -1479,19 +1479,19 @@ void Workspace::calcDesktopLayout(int &x, int &y) const
 bool Workspace::addSystemTrayWin( WId w )
     {
     if ( systemTrayWins.contains( w ) )
-        return TRUE;
+        return true;
 
     NETWinInfo ni( QX11Info::display(), w, root, NET::WMKDESystemTrayWinFor );
     WId trayWinFor = ni.kdeSystemTrayWinFor();
     if ( !trayWinFor )
-        return FALSE;
+        return false;
     systemTrayWins.append( SystemTrayWindow( w, trayWinFor ) );
     XSelectInput( QX11Info::display(), w,
                   StructureNotifyMask
                   );
     XAddToSaveSet( QX11Info::display(), w );
     propagateSystemTrayWins();
-    return TRUE;
+    return true;
     }
 
 /*!
@@ -1501,7 +1501,7 @@ bool Workspace::addSystemTrayWin( WId w )
 bool Workspace::removeSystemTrayWin( WId w, bool check )
     {
     if ( !systemTrayWins.contains( w ) )
-        return FALSE;
+        return false;
     if( check )
         {
     // When getting UnmapNotify, it's not clear if it's the systray
@@ -1528,7 +1528,7 @@ bool Workspace::removeSystemTrayWin( WId w, bool check )
         }
     systemTrayWins.remove( w );
     propagateSystemTrayWins();
-    return TRUE;
+    return true;
     }
 
 
@@ -1664,16 +1664,16 @@ void Workspace::slotMouseEmulation()
     if ( mouse_emulation ) 
         {
         XUngrabKeyboard(QX11Info::display(), QX11Info::appTime());
-        mouse_emulation = FALSE;
+        mouse_emulation = false;
         return;
         }
 
     if ( XGrabKeyboard(QX11Info::display(),
-                       root, FALSE,
+                       root, false,
                        GrabModeAsync, GrabModeAsync,
                        QX11Info::appTime()) == GrabSuccess ) 
         {
-        mouse_emulation = TRUE;
+        mouse_emulation = true;
         mouse_emulation_state = 0;
         mouse_emulation_window = 0;
         }
@@ -1734,7 +1734,7 @@ unsigned int Workspace::sendFakedMouseEvent( QPoint pos, WId w, MouseEmulation t
             e.y_root = pos.y();
             e.state = state;
             e.is_hint = NotifyNormal;
-            XSendEvent( QX11Info::display(), w, TRUE, ButtonMotionMask, (XEvent*)&e );
+            XSendEvent( QX11Info::display(), w, true, ButtonMotionMask, (XEvent*)&e );
             }
         else 
             {
@@ -1750,7 +1750,7 @@ unsigned int Workspace::sendFakedMouseEvent( QPoint pos, WId w, MouseEmulation t
             e.y_root = pos.y();
             e.state = state;
             e.button = button;
-            XSendEvent( QX11Info::display(), w, TRUE, ButtonPressMask, (XEvent*)&e );
+            XSendEvent( QX11Info::display(), w, true, ButtonPressMask, (XEvent*)&e );
 
             if ( type == EmuPress ) 
                 {
@@ -1793,7 +1793,7 @@ unsigned int Workspace::sendFakedMouseEvent( QPoint pos, WId w, MouseEmulation t
 bool Workspace::keyPressMouseEmulation( XKeyEvent& ev )
     {
     if ( root != QX11Info::appRootWindow() )
-        return FALSE;
+        return false;
     int kc = XKeycodeToKeysym(QX11Info::display(), ev.keycode, 0);
     int km = ev.state & (ControlMask | Mod1Mask | ShiftMask);
 
@@ -1870,16 +1870,16 @@ bool Workspace::keyPressMouseEmulation( XKeyEvent& ev )
     // fall through
         case XK_Escape:
             XUngrabKeyboard(QX11Info::display(), QX11Info::appTime());
-            mouse_emulation = FALSE;
-            return TRUE;
+            mouse_emulation = false;
+            return true;
         default:
-            return FALSE;
+            return false;
         }
 
     QCursor::setPos( pos );
     if ( mouse_emulation_state )
         mouse_emulation_state = sendFakedMouseEvent( pos, mouse_emulation_window, EmuMove, 0,  mouse_emulation_state );
-    return TRUE;
+    return true;
 
     }
 
@@ -1906,7 +1906,7 @@ void Workspace::requestDelayFocus( Client* c )
     delete delayFocusTimer;
     delayFocusTimer = new QTimer( this );
     connect( delayFocusTimer, SIGNAL( timeout() ), this, SLOT( delayFocus() ) );
-    delayFocusTimer->start( options->delayFocusInterval, TRUE  );
+    delayFocusTimer->start( options->delayFocusInterval, true  );
     }
     
 void Workspace::cancelDelayFocus()
@@ -2359,7 +2359,7 @@ void Workspace::startKompmgr()
         return;
     if (!kompmgr->start(KProcess::OwnGroup, KProcess::Stderr))
         {
-        options->useTranslucency = FALSE;
+        options->useTranslucency = false;
         KProcess proc;
         proc << "kdialog" << "--error"
             << i18n("The Composite Manager could not be started.\\nMake sure you have \"kompmgr\" in a $PATH directory.")
@@ -2369,8 +2369,8 @@ void Workspace::startKompmgr()
     else
         {
         connect(kompmgr, SIGNAL(processExited(KProcess*)), SLOT(restartKompmgr()));
-        options->useTranslucency = TRUE;
-        allowKompmgrRestart = FALSE;
+        options->useTranslucency = true;
+        allowKompmgrRestart = false;
         QTimer::singleShot( 60000, this, SLOT(unblockKompmgrRestart()) );
         QByteArray ba;
         QDataStream arg(&ba, QIODevice::WriteOnly);
@@ -2385,7 +2385,7 @@ void Workspace::stopKompmgr()
     if (!kompmgr  || !kompmgr->isRunning())
         return;
     kompmgr->disconnect(this, SLOT(restartKompmgr()));
-    options->useTranslucency = FALSE;
+    options->useTranslucency = false;
     if (popup){ delete popup; popup = 0L; } // to add/remove opacity slider
     kompmgr->kill();
     QByteArray ba;
@@ -2401,7 +2401,7 @@ bool Workspace::kompmgrIsRunning()
 
 void Workspace::unblockKompmgrRestart()
 {
-    allowKompmgrRestart = TRUE;
+    allowKompmgrRestart = true;
 }
 
 void Workspace::restartKompmgr()
@@ -2409,7 +2409,7 @@ void Workspace::restartKompmgr()
 {
     if (!allowKompmgrRestart) // uh-ohh
         {
-        options->useTranslucency = FALSE;
+        options->useTranslucency = false;
         KProcess proc;
         proc << "kdialog" << "--error"
             << i18n( "The Composite Manager crashed twice within a minute and is therefore disabled for this session.")
@@ -2429,7 +2429,7 @@ void Workspace::restartKompmgr()
 // -------------------
     if (!kompmgr->start(KProcess::NotifyOnExit, KProcess::Stderr))
         {
-        options->useTranslucency = FALSE;
+        options->useTranslucency = false;
         KProcess proc;
         proc << "kdialog" << "--error"
             << i18n("The Composite Manager could not be started.\\nMake sure you have \"kompmgr\" in a $PATH directory.")
@@ -2438,7 +2438,7 @@ void Workspace::restartKompmgr()
         }
     else
         {
-        allowKompmgrRestart = FALSE;
+        allowKompmgrRestart = false;
         QTimer::singleShot( 60000, this, SLOT(unblockKompmgrRestart()) );
         }
 }
diff --git a/workspace.h b/workspace.h
index 2e9863fdcc..7c3a726016 100644
--- a/workspace.h
+++ b/workspace.h
@@ -73,7 +73,7 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
     {
     Q_OBJECT
     public:
-        Workspace( bool restore = FALSE );
+        Workspace( bool restore = false );
         virtual ~Workspace();
 
         static Workspace * self() { return _self; }
@@ -112,8 +112,8 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
         // stealing prevention code.
         Client* mostRecentlyActivatedClient() const;
 
-        void activateClient( Client*, bool force = FALSE  );
-        void requestFocus( Client* c, bool force = FALSE );
+        void activateClient( Client*, bool force = false  );
+        void requestFocus( Client* c, bool force = false );
         void takeActivity( Client* c, int flags, bool handled ); // flags are ActivityFlags
         void handleTakeActivity( Client* c, Time timestamp, int flags ); // flags are ActivityFlags
         bool allowClientActivation( const Client* c, Time time = -1U, bool focus_in = false );