API练习_图形

 1 #include<windows.h>
 2 LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
 3 int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,
 4                    PSTR szCmdLine,int iCmdShow)
 5 {
 6     static TCHAR szAppName[]=TEXT("AltWind");
 7     HWND hwnd;
 8     MSG msg;
 9     WNDCLASS wndclass;
10     wndclass.style=CS_HREDRAW|CS_VREDRAW;
11     wndclass.lpfnWndProc=WndProc;
12     wndclass.cbClsExtra=0;
13     wndclass.cbWndExtra=0;
14     wndclass.hInstance=hInstance;
15     wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
16     wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
17     wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
18     wndclass.lpszMenuName=NULL;
19     wndclass.lpszClassName=szAppName;
20     
21 
22     if(!RegisterClass(&wndclass))
23     {
24         MessageBox(NULL,TEXT("Program requires Windows NT!"),
25             szAppName,MB_ICONERROR);
26         return 0;
27     }
28 hwnd=CreateWindow(szAppName,TEXT("Altermate and winding FillModes"),
29                   WS_OVERLAPPEDWINDOW,
30                   CW_USEDEFAULT,CW_USEDEFAULT,
31                   CW_USEDEFAULT,CW_USEDEFAULT,
32                   NULL,NULL,hInstance,NULL);
33 ShowWindow(hwnd,iCmdShow);
34 UpdateWindow(hwnd);
35 while(GetMessage(&msg,NULL,0,0))
36 {
37     TranslateMessage(&msg);
38     DispatchMessage(&msg);
39 }
40 return msg.wParam;
41 }
42 LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
43 {
44     static POINT aptFigure[10]={10,70,50,70,50,10,90,10,90,50,
45         30,50,30,90,70,90,70,30,10,30};
46     static int cxClient,cyClient;
47 
48     HDC hdc;
49     int i;
50     PAINTSTRUCT ps;
51     POINT apt[10];
52 
53     switch(message)
54     {
55     case WM_SIZE:
56         cxClient=LOWORD(lParam);
57         cyClient=HIWORD(lParam);
58         return 0;
59     case WM_PAINT:
60         hdc=BeginPaint(hwnd,&ps);
61         SelectObject(hdc,GetStockObject(GRAY_BRUSH));
62 
63         for(i=0;i<10;i++)
64         {
65             apt[i].x=cxClient*aptFigure[i].x/200;
66             apt[i].y=cyClient*aptFigure[i].y/100;
67         }
68         SetPolyFillMode(hdc,ALTERNATE);
69         Polygon(hdc,apt,10);
70         for(i=0;i<10;i++)
71         {
72             apt[i].x+=cxClient/2;
73         }
74         SetPolyFillMode(hdc,WINDING);
75         Polygon(hdc,apt,10);
76 
77         EndPaint(hwnd,&ps);
78         return 0;
79     case WM_DESTROY:
80         PostQuitMessage(0);
81         return 0;
82     }
83     return DefWindowProc(hwnd,message,wParam,lParam);
84 }