Doubt on WM_CLOSE

This is a discussion on Doubt on WM_CLOSE within the Windows Programming forums, part of the Platform Specific Boards category; Hi, a while ago I started learning Windows Programming from a tutorial on the Microsoft website, and I learnt that ...

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    Doubt on WM_CLOSE

    Hi, a while ago I started learning Windows Programming from a tutorial on the Microsoft website, and I learnt that you can call a message box from WM_CLOSE asking whether you want to close it or not.

    I also found out that you can ignore it based on which button on the message box the user clicks and that returning 0 will make the OS ignore the message and not close the window.

    So, my question is this: If I was to directly return 0 without checking for a response from Message box, would the program run forever?

    For obvious reasons, I am not trying this out. Any help would be appreciated. Thank you!

    PS: This is the link to the tutrial: Closing the Window (Windows)
    It's a miracle that curiosity survives formal education - Albert Einstein

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    Registered User Codeplug's Avatar
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    >> For obvious reasons, I am not trying this out.
    You can always kill the process using task manager. I prefer process explorer: Process Explorer

    gg

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    Hm.
    Never struck me. Thanks!
    It's a miracle that curiosity survives formal education - Albert Einstein

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    Quote Originally Posted by Dakshin View Post
    I also found out that you can ignore it based on which button on the message box the user clicks and that returning 0 will make the OS ignore the message and not close the window.

    So, my question is this: If I was to directly return 0 without checking for a response from Message box, would the program run forever?
    Returning 0 from your WM_CLOSE handler has nothing to do with whether or not the program stops.

    What causes the program to stop is calling DestroyWindow, which sends a WM_DESTROY message that you respond to with PostQuitMessage, which sends a WM_QUIT message that GetMessage responds to by returning 0 to the while loop in WinMain, causing that loop to terminate, causing the program to terminate.

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