#include #include #include #include #define Pi 3.1415926long WINAPI WndProc(HWND hWnd, UINT iMessage, UINT wParam, LONG lParam);BOOL InitWindowsClass(HINSTANCE hInstance);BOOL InitWindows(HINSTANCE hInstance, int nCmdShow);int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow){ MSG Message; if (!InitWindowsClass(hInstance)) return FALSE; if (!InitWindows(hInstance, nCmdShow)) return FALSE; while (GetMessage(&Message, 0, 0, 0)) { TranslateMessage(&Message); DispatchMessage(&Message); } return Message.wParam;}long WINAPI WndProc(HWND hWnd, UINT iMessage, UINT wParam, LONG lParam){ HDC hDC; HPEN hPen; PAINTSTRUCT PtStr; int n = 25; POINT points[25]; double angel = 2 * Pi / n; for (int i = 0; i < n; i++) { points[i].x = static_cast (320 + 180 * cos(i*angel)); points[i].y = static_cast (250 + 180 * sin(i*angel)); } switch (iMessage) { case WM_PAINT: hDC = BeginPaint(hWnd, &PtStr); for (int i = 0; i < 25; i++) { hPen = (HPEN)GetStockObject(NULL_PEN); SelectObject(hDC, hPen); LineTo(hDC, points[i].x, points[i].y); DeleteObject(hPen); if (i == 0) { for (int j = 1; j < n; j++) { switch (j % 6) { case 1: case 2: hPen = CreatePen(PS_SOLID, 1, RGB(255, 0, 0)); break; case 3: case 4: hPen = CreatePen(PS_SOLID, 1, RGB(0, 255, 0)); break; case 5: case 0: hPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 255)); break; } SelectObject(hDC, hPen); LineTo(hDC, points[j].x, points[j].y); MoveToEx(hDC, points[i].x, points[i].y, NULL); DeleteObject(hPen); } } else { for (int j = i + 1; j < n; j++) { switch (j % 6) { case 1: case 2: hPen = CreatePen(PS_SOLID, 1, RGB(255, 0, 0)); break; case 3: case 4: hPen = CreatePen(PS_SOLID, 1, RGB(0, 255, 0)); break; case 5: case 0: hPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 255)); break; } SelectObject(hDC, hPen); LineTo(hDC, points[j].x, points[j].y); MoveToEx(hDC, points[i].x, points[i].y, NULL); DeleteObject(hPen); Sleep(50); } } } EndPaint(hWnd, &PtStr); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; default: return(DefWindowProc(hWnd, iMessage, wParam, lParam)); }}BOOL InitWindows(HINSTANCE hInstance, int nCmdShow) { HWND hWnd; hWnd = CreateWindow("WinFill", " 万花筒", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); if (!hWnd) return FALSE; ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); return TRUE;}BOOL InitWindowsClass(HINSTANCE hInstance) { WNDCLASS WndClass; WndClass.cbClsExtra = 0; WndClass.cbWndExtra = 0; WndClass.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH)); WndClass.hCursor = LoadCursor(NULL, IDC_ARROW); WndClass.hIcon = LoadIcon(NULL, "END"); WndClass.hInstance = hInstance; WndClass.lpfnWndProc = WndProc; WndClass.lpszClassName = "WinFill"; WndClass.lpszMenuName = NULL; WndClass.style = CS_HREDRAW | CS_VREDRAW; return RegisterClass(&WndClass);} 绘制万花筒时的截图：
尝试了多次后，终于可以让图片在博客里显示了......