--- old/src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java	2013-06-03 20:27:03.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java	2013-06-03 20:27:03.000000000 +0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -115,6 +115,8 @@
 
     static final int RESIZABLE = 1 << 9; // both a style bit and prop bit
     static final int NONACTIVATING = 1 << 24;
+    static final int IS_DIALOG = 1 << 25;
+    static final int IS_MODAL = 1 << 26;
 
     static final int _STYLE_PROP_BITMASK = DECORATED | TEXTURED | UNIFIED | UTILITY | HUD | SHEET | CLOSEABLE | MINIMIZABLE | RESIZABLE;
 
@@ -371,6 +373,13 @@
             }
         }
 
+        if (isDialog) {
+            styleBits = SET(styleBits, IS_DIALOG, true);
+            if (((Dialog) target).isModal()) {
+                styleBits = SET(styleBits, IS_MODAL, true);
+            }
+        }
+
         peer.setTextured(IS(TEXTURED, styleBits));
 
         return styleBits;