Getting the position of a child window

This is a discussion on Getting the position of a child window within the Windows Programming forums, part of the Platform Specific Boards category; Hi, I'm trying to process the WM_SIZE message in my main window's WindowProc so that a child window (used for ...

  1. #1
    Registered /usr
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    Getting the position of a child window

    Hi,
    I'm trying to process the WM_SIZE message in my main window's WindowProc so that a child window (used for displaying images) has a scrollbar window underneath it (not actually "in" the child window). I've tried using GetWindowRect and setting the scrollbars window's Top value to the resulting RECT's top, but as the coordinates are relative to the screen this doesn't work properly. I was thinking of perhaps using MapWindowPoints in some way. Any ideas?

  2. #2
    train spotter
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    You could try the GetWindowRect and GetClientRect
    then use ClientToScreen or ScreenToClient to convert to one set of cood.

    Or look at ScrollDC or ScrollWindow.

  3. #3
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    I figured it out!

    Using the following code:-

    GetWindowRect(hView, &rcView);
    MapWindowPoints(HWND_DESKTOP, hwnd, (LPPOINT)&rcView, 2);

    Gives me the child window's (hView) position relative to its parent (hwnd).

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