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How do I get a HWND from inside a DLL?

I have a DLL that I want to play sounds using Direct Sound. In order to play sounds, I need the HWND of the executable. I don't have a HWND of the executable that loads the DLL. How do I get that in the DLL without passing it in from the executable?

Solution

  • You could use GetCurrentProcessId to get the current process Id.

    You could then call EnumWindows, and check each window with GetWindowThreadProcessId to find a window associated with your process.

    However, an easier option might be to just generate your own Window. You can create a 1x1 pixel window that is not visible, and use it with Direct Sound.

    This has the advantage of working even if your calling process doesn't have a usable window (or deletes window handles regularly).