windows 程序运行原理

#include 
#include 

// 消息处理过程函数
LRESULT CALLBACK messageProc(HWND hwnd,UINT uMsg,WPARAM wparam,LPARAM lParam){
    return DefWindowProc(hwnd,uMsg,wparam,lParam);
}

// 入口函数
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow){
        // 设计窗口
    WNDCLASS wndcls;
    wndcls.cbClsExtra=0;
    wndcls.cbWndExtra=0;
    wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
    wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
    wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
    wndcls.hInstance=hInstance;
    wndcls.lpfnWndProc=messageProc;
    wndcls.lpszClassName="guosi";
    wndcls.lpszMenuName=NULL;
    wndcls.style=CS_HREDRAW|CS_VREDRAW;
    RegisterClass(&wndcls);
        
   // 创建窗口
    HWND hwnd;
    hwnd=CreateWindow("guosi","desc",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);

    // 显示窗口
    ShowWindow(hwnd,SW_SHOWNORMAL);
        
    // 更新窗口
    UpdateWindow(hwnd);

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

    return 1;
}