--- a/dwt/widgets/Display.d	Wed Aug 27 14:30:35 2008 +0200
+++ b/dwt/widgets/Display.d	Wed Aug 27 14:32:39 2008 +0200
@@ -769,7 +769,7 @@
         int tag = OS.objc_msgSend(handle, OS.sel_tag);
         if (tag !is -1) {
             Object object = OS.JNIGetObject(tag);
-            if (object instanceof Widget) {
+            if ( null !is cast(Widget)object ) {
                 return cast(Widget)object;
             }
         }
@@ -869,7 +869,7 @@
             int tag = OS.objc_msgSend(view.id, OS.sel_tag);
             if (tag !is -1) {
                 Object object = OS.JNIGetObject(tag);
-                if (object instanceof Shell) {
+                if ( null !is cast(Shell)object ) {
                     return cast(Shell)object;
                 }
             }
@@ -1119,7 +1119,7 @@
             int tag = OS.objc_msgSend(view.id, OS.sel_tag);
             if (tag !is -1) {
                 Object object = OS.JNIGetObject(tag);
-                if (object instanceof Control) {
+                if ( null !is cast(Control)object ) {
                     //TODO go up hierarchy
                     return cast(Control)object;
                 }
@@ -1138,7 +1138,7 @@
                                 tag = OS.objc_msgSend(delegate.id, OS.sel_tag);
                                 if (tag !is 0 && tag !is -1) {
                                     Object object = OS.JNIGetObject(tag);
-                                    if (object instanceof Control) {
+                                    if ( null !is cast(Control)object ) {
                                         return cast(Control)object;
                                     }
                                 }
@@ -1332,7 +1332,7 @@
             int jniRef = OS.objc_msgSend(view.id, OS.sel_tag);
             if (jniRef !is 0 && jniRef !is -1) {
                 Object object = OS.JNIGetObject(jniRef);
-                if (object instanceof Shell) {
+                if ( null !is cast(Shell)object ) {
                     result[index++] = cast(Shell)object;
                 }
             }
@@ -3114,9 +3114,9 @@
         dialog.changeFont(arg0);
     } else if (sel is OS.sel_windowWillClose_1) {
         Object object = OS.JNIGetObject(jniRef);
-        if (object instanceof FontDialog) {
+        if ( null !is cast(FontDialog)object ) {
             (cast(FontDialog)object).windowWillClose(arg0);
-        } else if (object instanceof ColorDialog) {
+        } else if ( null !is cast(ColorDialog)object ) {
             (cast(ColorDialog)object).windowWillClose(arg0);
         }
     }