Vc++例题加课后.docVIP

例题4.1利用绘图函数创建填充区。 #includewindows.h #includestdlib.h #includestring.h long 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)) //消息循环 { TranslateMessage(Message); DispatchMessage(Message); } return Message.wParam; } long WINAPI WndProc(HWND hWnd,UINT iMessage, UINT wParam,LONG lParam) { HDC hDC; //定义指向设备的句柄 HBRUSH hBrush; //定义指向画刷的句柄 HPEN hPen; //定义指向画笔的句柄 PAINTSTRUCT PtStr;//定义指向包含绘图信息的结构体变量 switch(iMessage) //处理消息 {case WM_PAINT: //处理绘图消息 hDC=BeginPaint(hWnd,PtStr); SetMapMode(hDC,MM_ANISOTROPIC); //设置映像模式 hPen=(HPEN)GetStockObject(BLACK_PEN); //黑色画笔 hBrush=(HBRUSH)GetStockObject(DKGRAY_BRUSH); //画刷 SelectObject(hDC,hBrush); //选择画刷 SelectObject(hDC,hPen); //选择画笔 RoundRect(hDC,50,120,100,200,15,15); //绘制圆角矩形 hBrush=(HBRUSH)GetStockObject(LTGRAY_BRUSH); //采用亮灰色画刷 SelectObject(hDC,hBrush); //选择画刷 Ellipse(hDC,150,50,200,150); //绘制椭圆 hBrush=(HBRUSH)GetStockObject(HOLLOW_BRUSH); //虚画刷 SelectObject(hDC,hBrush); //选择画刷 Pie(hDC,250,50,300,100,250,50,300,50); //绘制饼形 EndPaint(hWnd,PtStr); //结束绘图 return 0; case WM_DESTROY: //结束应用程序 PostQuitMessage(0); return 0; default: //其他消息处理程序 return(DefWindowProc(hWnd,iMessage,wParam,lParam)) ; } } BOOL InitWindows(HINSTANCE hInstance,int nCmdShow)//初始化窗口 { HWND hWnd; hWnd=CreateWindow(WinFill, //生成窗口 填充示例程序, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); if(!hWnd) return FALSE; hWndMain=hWnd; ShowWindow(hWnd,nCmdShow); //显示窗口 UpdateWind