--- old/src/windows/native/sun/windows/awt_Window.h	2013-02-15 13:38:05.000000000 +0400
+++ new/src/windows/native/sun/windows/awt_Window.h	2013-02-15 13:38:04.000000000 +0400
@@ -143,6 +143,7 @@
     INLINE HICON GetHIcon() {return m_hIcon;};
     INLINE HICON GetHIconSm() {return m_hIconSm;};
     INLINE BOOL IsIconInherited() {return m_iconInherited;};
+    INLINE virtual BOOL IsLightweightFrame() {return FALSE;}
 
     /* Post events to the EventQueue */
     void SendComponentEvent(jint eventId);
@@ -193,13 +194,15 @@
 
     // Execute on Toolkit only.
     INLINE static LRESULT SynthesizeWmActivate(BOOL doActivate, HWND targetHWnd, HWND oppositeHWnd) {
+        AwtWindow *win = static_cast<AwtWindow*>(AwtComponent::GetComponent(targetHWnd));
         if (doActivate &&
-            (!::IsWindowVisible(targetHWnd) || ::IsIconic(::GetAncestor(targetHWnd, GA_ROOT))))
+            (!::IsWindowVisible(targetHWnd) || ::IsIconic(::GetAncestor(targetHWnd, GA_ROOT))) &&
+            (win == NULL || !win->IsLightweightFrame()))
         {
             // The activation is rejected if either:
             // - The toplevel is not visible
             // - The toplevel (or its embedder) is minimised
-            return 1;
+	    return 1;
         }
         return ::SendMessage(targetHWnd, WM_ACTIVATE,
                              MAKEWPARAM(doActivate ? WA_ACTIVE : WA_INACTIVE, FALSE),