how to show my Dialog?

I design a program that include a menu and a dialog.
But It cant work. I dont know what happening.
 Could u tell me how to solve it? My program is following:

resorce.rc
 include a menu and dialog

win.cpp

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

HINSTANCE hInst;
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
BOOL CALLBACK TestDlgProc(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=MAKEINTRESOURCE(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))
 {
  if(hDlgModeless||!IsDialogMessage(hDlgModeless,&msg))
  {
   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,"?????????I???T?????d","???O?k?H",MB_OK);
     return 0;
    case ID__40002:
     DestroyWindow(hWnd);
     return 0;
    case ID_40007:
     if(!hDlgModeless)
     {
      hDlgModeless=CreateDialog(hInst,"IDD_DIALOG1",hWnd,(DLGPROC)TestDlgProc);
     }
     //MessageBox(hWnd,"???????????J","???O?k?H",MB_OK);
     return 0;
   }
   break;

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

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

BOOL CALLBACK TestDlgProc(HWND hDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
 switch(uMsg)
 {
 // case WM_INITDIALOG:
  case WM_COMMAND:
  case ID_OK:
   DestroyWindow(hDlg);
   return(TRUE);
  case ID_CANCEL:
   DestroyWindow(hDlg);
   return(TRUE);

 }
}