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copied!<p>There are few problems with your program:</p> <ol> <li>C programs do end when they leave <code>main()</code> so there is no time when the timer can occur.</li> <li><p>Win32 timers need the message pump (see below) to be working, as they are implemented through <code>WM_TIMER</code> message, even when they are not associated with any window, and if you provide function callback.</p> <blockquote> <p>When you specify a TimerProc callback function, the default window procedure calls the callback function when it processes WM_TIMER. Therefore, you need to dispatch messages in the calling thread, even when you use TimerProc instead of processing WM_TIMER.</p> <p><sub>Source: <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms644906%28v=vs.85%29.aspx" rel="noreferrer">MSDN: SetTimer function</a></sub></p> </blockquote></li> <li><p>The callback function has bad prototype. See <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms644907%28v=vs.85%29.aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/windows/desktop/ms644907%28v=vs.85%29.aspx</a></p> <pre><code>void CALLBACK f(HWND hwnd, UINT uMsg, UINT timerId, DWORD dwTime) { printf("Hello"); } int main() { MSG msg; SetTimer(NULL, 0, 1000*60,(TIMERPROC) &f); while(GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return 0; } </code></pre></li> </ol> <p>(Note this example program never ends, instead, real program should have some additional logic to do so by sending <code>WM_QUIT</code>).</p>

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