Other scenarios do not cause conflicts. Direct call to DefWindowProc is much faster it's better to preserve it.

--Semyon

On 9/16/2015 4:52 PM, Sergey Bylokhov wrote:
Why we cannot always send a messages via SendMessage?
Can you add a comment to the changed lines to clarify the fix. It is unclear for example why IsContainer() is used.

16.09.2015 15:36, Semyon Sadetsky wrote:
Hello,

Please review fix for JDK9:
bug: https://bugs.openjdk.java.net/browse/JDK-8079595
webrev: http://cr.openjdk.java.net/~ssadetsky/8079595/webrev.00/

Direct call to DefWindowProc() of the child window's owner causes a conflict. Using SendMessage() eliminates it.

--Semyon



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