參考資訊:
http://www.winprog.org/tutorial/
http://winapi.freetechsecrets.com/win32/
https://github.com/gammasoft71/Examples_Win32
http://masm32.com/board/index.php?topic=3584.0
https://learn.microsoft.com/en-us/windows/win32/winmsg/window-styles
Windows的Timer中斷週期是基於早期系統架構,因此,最短的Timer時間間隔為15ms,因此,即使Timer設定為1ms,觸發時間依舊為15ms
main.c
#include <stdbool.h> #include <stdio.h> #include <string.h> #include <windows.h> int cnt = 0; HWND hWin = NULL; WNDPROC defWndProc = NULL; LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { char buf[255] = {0}; switch (uMsg) { case WM_TIMER: sprintf(buf, "%d", cnt++); SetWindowText(hWnd, buf); break; case WM_CLOSE: DestroyWindow(hWnd); return 0; case WM_DESTROY: KillTimer(hWnd, 1); PostQuitMessage(0); return 0; } return CallWindowProc(defWndProc, hWnd, uMsg, wParam, lParam); } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { hWin = CreateWindow(WC_DIALOG, "main", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL); defWndProc = (WNDPROC)SetWindowLongPtr(hWin, GWLP_WNDPROC, (long int)WndProc); SetTimer(hWin, 1, 1000, NULL); MSG msg = {0}; while (GetMessage(&msg, NULL, 0, 0)) { DispatchMessage(&msg); } ExitProcess(0); return 0; }
Line 15~17:累加數值並且顯示在視窗標題
Line 23:不使用Timer,記得關閉Timer
Line 35:設定Timer為每秒(1000ms)觸發一次,ID=1
編譯、執行
$ i686-w64-mingw32-gcc -mwindows main.c -o main.exe $ wine ./main.exe