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Delphi寫的DLL，OCX中多線程一個同步問題，delphiocx

Msg of WM_NULL: CheckSynchronize; else Message. ... begin PostMessage(FHandle, WM_NULL, 0, 0); end; procedure TDLLSystemController.

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查詢 「wm_null」的人也找了：

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  6. wm_stylechanged
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  7. wm_userchanged
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  8. wm_windowposchanged
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