--- a/dwt/custom/ViewFormLayout.d	Wed Aug 27 14:30:35 2008 +0200
+++ b/dwt/custom/ViewFormLayout.d	Wed Aug 27 14:32:39 2008 +0200
@@ -82,7 +82,7 @@
 
 Point computeChildSize(Control control, int wHint, int hHint, bool flushCache) {
     Object data = control.getLayoutData();
-    if (data is null || !(data instanceof CLayoutData)) {
+    if (data is null || !( null !is cast(CLayoutData)data )) {
         data = new CLayoutData();
         control.setLayoutData(data);
     }
@@ -90,7 +90,7 @@
 }
 
 int computeTrim(Control c) {
-    if (c instanceof Scrollable) {
+    if ( null !is cast(Scrollable)c ) {
         Rectangle rect = (cast(Scrollable) c).computeTrim (0, 0, 0, 0);
         return rect.width;
     }
@@ -99,7 +99,7 @@
 
 protected bool flushCache(Control control) {
     Object data = control.getLayoutData();
-    if (data !is null && data instanceof CLayoutData) (cast(CLayoutData)data).flushCache();
+    if (data !is null && null !is cast(CLayoutData)data ) (cast(CLayoutData)data).flushCache();
     return true;
 }