Check validity of HWND after window is closed?
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Hi I have a VC++6 application in which I continuously update the display for a certain time after the user clicks a button. I accomplished this by creating a separate thread the sends a message to the window via the window's HWND. This way, my app won't 'hang' when the user switches window. However, when this thread is still active, there's a possibility that the user may close the window, invalidating its HWND. Is there a way for the thread to check whether the HWND is still valid? Thanks!
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Hi I have a VC++6 application in which I continuously update the display for a certain time after the user clicks a button. I accomplished this by creating a separate thread the sends a message to the window via the window's HWND. This way, my app won't 'hang' when the user switches window. However, when this thread is still active, there's a possibility that the user may close the window, invalidating its HWND. Is there a way for the thread to check whether the HWND is still valid? Thanks!
First off, don't use
SendMessageto send messages from a thread to a window, usePostMessageto post them instead. To check if a window is still valid useIsWindow(HWND).
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