WIN32 的框架代码

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#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 ("HelloWin") ;
    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 ("This program requires Windows NT!"),
                          szAppName, MB_ICONERROR) ;
        return 0 ;
     }
    hwnd = CreateWindow( szAppName,    // window class name
            TEXT ("The Hello Program"),    // window caption
            WS_OVERLAPPEDWINDOW,    // window style
            CW_USEDEFAULT,    // initial x position
            CW_USEDEFAULT,    // initial y position
            CW_USEDEFAULT,    // initial x size
            CW_USEDEFAULT,    // initial y size
            NULL,            // parent window handle
            NULL,            // window menu handle
            hInstance,        // program instance handle
            NULL) ;         // creation parameters

    ShowWindow (hwnd, iCmdShow) ;
    UpdateWindow (hwnd) ;

    while (GetMessage (&msg, NULL, 0, 0))
     {
        TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }
    return (int)msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC            hdc ;
    PAINTSTRUCT ps ;
    RECT        rect ;

    switch (message)
     {
    case     WM_PAINT:
        hdc = BeginPaint (hwnd, &ps) ;

        GetClientRect (hwnd, &rect) ;

        DrawText (hdc, TEXT ("Hello, Windows XP!"), -1, &rect,
            DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
              EndPaint (hwnd, &ps) ;
            return 0 ;

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