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Editorial Team
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Asked: 2026-05-26T20:24:54+00:00

I’m using an API for games. It creates the window for me but there

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I’m using an API for games. It creates the window for me but there are a few messages I’d like to do something with. For example, when the screen is resizing I want to display a black screen. Essentially, I have the HWND of my main window and would like to listen to the messages and have them go through my custom WndProc before or after they are processed, I just want to know when the window receives messages like WM_SIZE or something.

Is there an API for this?

Thanks

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1 Answer

  1. Editorial Team

    If you are in the same process with the window that you want to intercept WM_SIZE, you can simply replace WndProc by SetWindowLongPtr with GWLP_WNDPROC. Note that you must pass the other messages to the original WndProc.

    However, if you are in the different process, then you need to find a way using hooks such as SetWindowsHookEx

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