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- /*-----------------------------------------
- BEEPER1.C -- Timer Demo Program No. 1
- (c) Charles Petzold, 1998
- -----------------------------------------*/
-
- #include <windows.h>
-
- #define ID_TIMER 1
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT ("Beeper1") ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- if (!RegisterClass (&wndclass))
- {
- MessageBox (NULL, TEXT ("Program requires Windows NT!"),
- szAppName, MB_ICONERROR) ;
- return 0 ;
- }
-
- hwnd = CreateWindow (szAppName, TEXT ("Beeper1 Timer Demo"),
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- static BOOL fFlipFlop = FALSE ;
- HBRUSH hBrush ;
- HDC hdc ;
- PAINTSTRUCT ps ;
- RECT rc ;
-
- switch (message)
- {
- case WM_CREATE:
- SetTimer (hwnd, ID_TIMER, 1000, NULL) ;
- return 0 ;
-
- case WM_TIMER :
- MessageBeep (-1) ;
- fFlipFlop = !fFlipFlop ;
- InvalidateRect (hwnd, NULL, FALSE) ;
- return 0 ;
-
- case WM_PAINT :
- hdc = BeginPaint (hwnd, &ps) ;
-
- GetClientRect (hwnd, &rc) ;
- hBrush = CreateSolidBrush (fFlipFlop ? RGB(255,0,0) : RGB(0,0,255)) ;
- FillRect (hdc, &rc, hBrush) ;
-
- EndPaint (hwnd, &ps) ;
- DeleteObject (hBrush) ;
- return 0 ;
-
- case WM_DESTROY :
- KillTimer (hwnd, ID_TIMER) ;
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-