src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

@@ -61,10 +61,11 @@
     private static native void nativeSetNSWindowRepresentedFilename(long nsWindowPtr, String representedFilename);
     private static native void nativeSetNSWindowSecurityWarningPositioning(long nsWindowPtr, double x, double y, float biasX, float biasY);
     private static native void nativeSetEnabled(long nsWindowPtr, boolean isEnabled);
     private static native void nativeSynthesizeMouseEnteredExitedEvents(long nsWindowPtr);
     private static native void nativeDispose(long nsWindowPtr);
+    public static native CPlatformWindow nativeGetTopmostPlatformWindowUnderMouse();
 
     private static native int nativeGetNSWindowDisplayID_AppKitThread(long nsWindowPtr);
 
     // Loger to report issues happened during execution but that do not affect functionality
     private static final PlatformLogger logger = PlatformLogger.getLogger("sun.lwawt.macosx.CPlatformWindow");