第一个WindowApp程序

第一个WindowApp程序

  #include  < windows.h >

LRESULT CALLBACK WndProc(
                            HWND hwnd,       //  handle to window
                            UINT uMsg,       //  message identifier
                            WPARAM wParam,   //  first message parameter
                            LPARAM lParam    //  second message parameter
                            );


int  WINAPI WinMain(
                   HINSTANCE hInstance,       //  handle to current instance
                   HINSTANCE hPrevInstance,   //  handle to previous instance
                   LPSTR lpCmdLine,           //  command line
                    int  nCmdShow               //  show state
)
{
    HWND mywnd;
    MSG  msg;
    WNDCLASS wc;

    wc.cbClsExtra = 0;                                                            //设计窗口类
    wc.cbWndExtra = 0;
    wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //刷新背景
    wc.hCursor = LoadCursor(NULL,IDC_CROSS);                          //加载光标
    wc.hIcon = LoadIcon(NULL,IDI_ERROR);                                //加载图标
    wc.hInstance = hInstance;
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = "myclass";                                           //类名
    wc.lpszMenuName = NULL;
    wc.style = CS_HREDRAW | CS_VREDRAW;                            //类的风格

    RegisterClass(&wc);             //注册窗口类

    mywnd=CreateWindow("myclass","mywindow",WS_OVERLAPPEDWINDOW,50,50,700,500,NULL,NULL,hInstance,NULL );
                                                                                       //创建窗口

    ShowWindow(mywnd,nCmdShow);     //显示窗口
    UpdateWindow(mywnd);                  //更新窗口

    while(GetMessage(&msg,NULL,0,0))    //消息循环
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}

LRESULT CALLBACK WndProc(
                            HWND hwnd,             //  handle to window
                            UINT uMsg,              //  message identifier
                            WPARAM wParam,    //  first message parameter
                            LPARAM lParam        //  second message parameter
                            )                   //  回调函数

{
    switch(uMsg)
    {
    case WM_LBUTTONDOWN:
        MessageBox(hwnd,"Hello,World!","Hello",0);
        break;
    case WM_DESTROY:
        //DestroyWindow(hwnd); //只是关闭窗口，不能终止进程
        PostQuitMessage(0);    //能够终止进程
        break;
    default:
        return DefWindowProc(hwnd,uMsg,wParam,lParam);
    }
}

这是我的第一个Window程序，记录下来以备以后复习。