#include<stdio.h>
#include<windows.h>

long  _stdcall wndproc(HWND hwnd,UINT message,unsigned int wparam,long  lparam)
{
switch(message)
{case WM_CHAR:

break;
case WM_PAINT:
    PAINTSTRUCT ps;
    BeginPaint(hwnd,&ps);break;
case WM_CLOSE:
    ExitProcess(0);
    break;
default:
return DefWindowProc (hwnd, message, wparam, lparam) ;

}
return 654;

}

int _stdcall WinMain(HINSTANCE wer,HINSTANCE,char*,int)
{

WNDCLASS wndclass;
memset(&wndclass,0,sizeof wndclass);
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hInstance=wer;
wndclass.lpfnWndProc=wndproc;
wndclass.lpszClassName="ok";
wndclass.style=CS_HREDRAW|CS_VREDRAW;
wndclass.hCursor=LoadCursor(0,IDC_ARROW);

if(!RegisterClass(&wndclass))MessageBox(0,0,0,0);
HWND 
hwnd = CreateWindow( "ok",    // 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
            wer,        // program instance handle
            NULL) ;         // creation parameters
     
    ShowWindow (hwnd, SW_MAXIMIZE) ;
    UpdateWindow (hwnd) ;
     MSG msg;
    while (GetMessage (&msg, 0, 0, 0))
     {char s[199];
    
        wsprintf(s,"%x",msg.message);
        MessageBox(0,s,0,0);


        TranslateMessage (&msg) ;
     DispatchMessage (&msg) ;    
    
     }


}



这个程序getmessage后msg结构被填，那msg.message应该是各消息的编号（应该不同才是啊）怎么输出的messagebox显示结果相同呢？请指教