my window cant show menu. what happen for this program?

I write a simple program.This program just has a window and a menu.
but the result cant find menu. could u help me

my program code as following:

resource.h
//{{NO_DEPENDENCIES}}
// Microsoft Visual C++ generated include file.
// Used by resource.rc
//
#define IDR_MENU1 101
#define ID__40001 40001
#define ID__40002 40002

// Next default values for new objects
//
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE 102
#define _APS_NEXT_COMMAND_VALUE 40003
#define _APS_NEXT_CONTROL_VALUE 1001
#define _APS_NEXT_SYMED_VALUE 101
#endif
#endif

win.cpp

#include <windows.h>
#include "resource.h"
#include <iostream>
using namespace std;

HINSTANCE hInst;
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR
szCmdLine,int iCmdShow)
{
 static TCHAR szAppName[]="MyApp";
 HWND hWnd;
 MSG msg;
 WNDCLASSEX wndclass;
 wndclass.cbSize=sizeof(wndclass);
 wndclass.style=CS_HREDRAW|CS_VREDRAW;
 wndclass.lpfnWndProc=WndProc;
 wndclass.cbClsExtra=0;
 wndclass.cbWndExtra=0;
 wndclass.hInstance=hInstance;
 wndclass.hIcon=LoadCursor(NULL,IDI_APPLICATION);
 wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
 wndclass.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
 wndclass.lpszMenuName="IDR_MENU1";
 wndclass.lpszClassName=szAppName;
 wndclass.hIconSm=LoadIcon(NULL,IDI_APPLICATION);

 RegisterClassEx(&wndclass);

 hInst=hInstance;

 hWnd=CreateWindow(szAppName,"???????d",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 iMsg,WPARAM wParam,LPARAM lParam)
{
 HDC hDC;

 switch(iMsg)
 {
  case WM_CREATE:
   return 0;

  case WM_PAINT:
  {
   PAINTSTRUCT ps;
   hDC=BeginPaint(hWnd,&ps);
   EndPaint(hWnd,&ps);
  }
   return 0;

  case WM_COMMAND:
   switch(LOWORD(wParam))
   {
    case ID__40001:
     MessageBox(hWnd,"???????d","IDM_Command",MB_OK);
     return 0;
    case ID__40002:
     DestroyWindow(hWnd);
     return 0;
   }
   break;

  case WM_DESTROY:
   PostQuitMessage(0);
   return 0;
 }

 return DefWindowProc(hWnd,iMsg,wParam,lParam);
}