- m_macWindowBackgroundTheme = kThemeBrushDialogBackgroundActive ;
- SetThemeWindowBackground( (WindowRef) m_macWindow , m_macWindowBackgroundTheme , false ) ;
+#if TARGET_API_MAC_OSX
+ HIViewRef growBoxRef = 0 ;
+ OSStatus err = HIViewFindByID( HIViewGetRoot( (WindowRef)m_macWindow ), kHIViewWindowGrowBoxID, &growBoxRef );
+ if ( err == noErr && growBoxRef != 0 )
+ HIGrowBoxViewSetTransparent( growBoxRef, true ) ;
+#endif