How to batch calls to ShowWindow
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Thread: How to batch calls to ShowWindow

  1. #1
    Join Date
    Aug 2005
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    How to batch calls to ShowWindow

    I am updating a window by making several calls to ShowWindow() on the controls within the window. I can literally watch the controls coming and going, sometimes taking many seconds to complete. Is there a way I can freeze the window, make my calls to ShowWindow(), then unfreeze it, so that it paints only once?

  2. #2
    Join Date
    Feb 2002
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    4,640

    Re: How to batch calls to ShowWindow

    In the past, I've used the "LockWindowUpdate" function. However, it seems that this is not the proper use case. Check out the WM_SETREDRAW message. Send this message to the parent window of the controls.

    Viggy

  3. #3
    Join Date
    Aug 2000
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    New York, NY, USA
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    Re: How to batch calls to ShowWindow

    Quote Originally Posted by bobkohn View Post
    I am updating a window by making several calls to ShowWindow() on the controls within the window. I can literally watch the controls coming and going, sometimes taking many seconds to complete. Is there a way I can freeze the window, make my calls to ShowWindow(), then unfreeze it, so that it paints only once?
    Check out DeferWindowPos
    Vlad - MS MVP [2007 - 2012] - www.FeinSoftware.com
    Convenience and productivity tools for Microsoft Visual Studio:
    FeinViewer - an integrated GDI objects viewer for Visual C++ Debugger, and more...

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