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Asked: 2026-05-10T20:11:21+00:00

I’m writing a direct3d application and after noticing strange bugs such as anti-aliasing occurring

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I’m writing a direct3d application and after noticing strange bugs such as anti-aliasing occurring even when it was turned off and the mouse pointer not lining up to things with the same coordinates as itself I discovered that when creating a window the width and height parameters include the border. The program was rendering a 800×600 graphics output to a window of the same size, but because of the borders it was squished into 792×566 rectangle. I’ve increased the size of the window to compensate, but this does not work if the system uses a border style other the standard XP style. (Classic style, for example)

Is there a way to tell what the border width and heights will be before I create the window?

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1 Answer

  1. It sounds like you are looking for the GetSystemMetrics function. For example, the border width in pixels is returned by

    GetSystemMetrics(SM_CXBORDER)

    ADDED: For the total size you will need to add together the various ‘pieces’ of the non-client area: border, frame sizes, title bars, etc.

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