AppName, TEXT ("Draw a Clover"), 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 iMsg, WPARAM wParam, LPARAM lParam) { static HRGN hRgnClip ; static int cxClient, cyClient ; double fAngle, fRadius ; HCURSOR hCursor ; HDC hdc ; HRGN hRgnTemp[6] ; int i ; PAINTSTRUCT ps ; switch (iMsg) { case WM_SIZE: cxClient = LOWORD (lParam) ; cyClient = HIWORD (lParam) ; hCursor = SetCursor (LoadCursor (NULL, IDC_WAIT)) ; ShowCursor (TRUE) ; if (hRgnClip) DeleteObject (hRgnClip) ; hRgnTemp[0] = CreateEllipticRgn (0, cyClient / 3, cxClient / 2, 2 * cyClient / 3) ; hRgnTemp[1] = CreateEllipticRgn (cxClient / 2, cyClient / 3, cxClient, 2 * cyClient / 3) ; hRgnTemp[2] = CreateEllipticRgn (cxClient / 3, 0, 2 * cxClient / 3, cyClient / 2) ; hRgnTemp[3] = CreateEllipticRgn (cxClient / 3, cyClient / |