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=0;
    wndclass.cbWndExtra=0;
    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 0;
    }
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,0,0))
{
    TranslateMessage(&msg);
    DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
    static POINT aptFigure[10]={10,70,50,70,50,10,90,10,90,50,
        30,50,30,90,70,90,70,30,10,30};
    static int cxClient,cyClient;

    HDC hdc;
    int i;
    PAINTSTRUCT ps;
    POINT apt[10];

    switch(message)
    {
    case WM_SIZE:
        cxClient=LOWORD(lParam);
        cyClient=HIWORD(lParam);
        return 0;
    case WM_PAINT:
        hdc=BeginPaint(hwnd,&ps);
        SelectObject(hdc,GetStockObject(GRAY_BRUSH));

        for(i=0;i<10;i++)
        {
            apt[i].x=cxClient*aptFigure[i].x/200;
            apt[i].y=cyClient*aptFigure[i].y/100;
        }
        SetPolyFillMode(hdc,ALTERNATE);
        Polygon(hdc,apt,10);
        for(i=0;i<10;i++)
        {
            apt[i].x+=cxClient/2;
        }
        SetPolyFillMode(hdc,WINDING);
        Polygon(hdc,apt,10);

        EndPaint(hwnd,&ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd,message,wParam,lParam);
}