API练习_图形

 #include<windows.h>
 LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
 int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,
                    PSTR szCmdLine,int iCmdShow)
 {
     static TCHAR szAppName[]=TEXT("AltWind");
     HWND hwnd;
     MSG msg;
     WNDCLASS wndclass;
     wndclass.style=CS_HREDRAW|CS_VREDRAW;
     wndclass.lpfnWndProc=WndProc;
     wndclass.cbClsExtra=;
     wndclass.cbWndExtra=;
     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 ;
     }
 hwnd=CreateWindow(szAppName,TEXT("Altermate and winding FillModes"),
                   WS_OVERLAPPEDWINDOW,
                   CW_USEDEFAULT,CW_USEDEFAULT,
                   CW_USEDEFAULT,CW_USEDEFAULT,
                   NULL,NULL,hInstance,NULL);
 ShowWindow(hwnd,iCmdShow);
 UpdateWindow(hwnd);
 while(GetMessage(&msg,NULL,,))
 {
     TranslateMessage(&msg);
     DispatchMessage(&msg);
 }
 return msg.wParam;
 }
 LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
 {
     static POINT aptFigure[]={,,,,,,,,,,
         ,,,,,,,,,};
     static int cxClient,cyClient;

     HDC hdc;
     int i;
     PAINTSTRUCT ps;
     POINT apt[];

     switch(message)
     {
     case WM_SIZE:
         cxClient=LOWORD(lParam);
         cyClient=HIWORD(lParam);
         return ;
     case WM_PAINT:
         hdc=BeginPaint(hwnd,&ps);
         SelectObject(hdc,GetStockObject(GRAY_BRUSH));

         for(i=;i<;i++)
         {
             apt[i].x=cxClient*aptFigure[i].x/;
             apt[i].y=cyClient*aptFigure[i].y/;
         }
         SetPolyFillMode(hdc,ALTERNATE);
         Polygon(hdc,apt,);
         for(i=;i<;i++)
         {
             apt[i].x+=cxClient/;
         }
         SetPolyFillMode(hdc,WINDING);
         Polygon(hdc,apt,);

         EndPaint(hwnd,&ps);
         return ;
     case WM_DESTROY:
         PostQuitMessage();
         return ;
     }
     return DefWindowProc(hwnd,message,wParam,lParam);
 }