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POGracefully closing a windowless app in WinAPI
 

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    <p>I'm writing a little utility app to control the system master volume via hotkeys for my GF, whose laptop is for some reason deprived of such function keys. I whipped up the code pretty much instantly and I've got the main functionality working perfectly; however, since I'm not creating any windows (just a message loop handling the WM_HOTKEY message), I can't terminate the app in a more elegant manner than just gracelessly terminating the process (also, when the system is shutting down, it shows the "should I wait for the process to end or kill it now" window with some rubbish in the place where the window title usually is).</p> <p>Is there any way of doing this which doesn't involve creating a fake window just for the sake of intercepting WM_CLOSE messages?</p> <p>Here's the code (I left out the mixer control functions intentionally, they're irrelevant to the question):</p> <pre><code>int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nCmdShow) { MSG msg; int step; MixerInfo_t mi; HANDLE mutex; mutex = CreateMutex(NULL, TRUE, "volhotkey"); if (mutex == NULL) return 1; if (GetLastError() == ERROR_ALREADY_EXISTS) return 0; RegisterHotKey(NULL, 1, MOD_ALT | MOD_CONTROL, VK_F5); RegisterHotKey(NULL, 2, MOD_ALT | MOD_CONTROL, VK_F6); RegisterHotKey(NULL, 3, MOD_ALT | MOD_CONTROL, VK_F7); mi = GetMixerControls(); step = (mi.maxVolume - mi.minVolume) / 20; while (GetMessage(&amp;msg, NULL, 0, 0)) { switch (msg.message) { case WM_HOTKEY: switch (msg.wParam) { case 1: AdjustVolume(&amp;mi, -step); break; case 2: AdjustVolume(&amp;mi, step); break; case 3: SetMute(&amp;mi, !IsMuted(&amp;mi)); break; } MessageBeep(MB_ICONASTERISK); break; case WM_DESTROY: PostQuitMessage(0); break; default: break; } } UnregisterHotKey(NULL, 1); UnregisterHotKey(NULL, 2); return msg.wParam; } </code></pre> <p>Thanks in advance!</p> <p>Oh, and for the record, WM_DESTROY is also never posted.</p>
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    1. COHave you checked your laptop manufacturer's support site to see if they already provide such a utility?
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    2. COI have, and they don't. It's a HP nx6110 and it doesn't even have buttons for it, as I stated in the question already.
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