帮忙看看这段API写的动态菜单为什么没有效果？编译通过

#define WIN32_LEAN_AND_MEAN

#include "stdafx.h"

#include "resource.h"

#define ID_NEWITEM 1013            //¶¨Òåв˵¥ÏîµÄ±êʶ·û

#define ID_NEWSYSITEM 60441       //¶¨ÒåÐÂϵͳ²Ëµ¥Ïî±êʶ·û



LRESULT CALLBACK MainProc(HWND,UINT,WPARAM,LPARAM);    //Ö÷´°¿Úº¯Êý

BOOL WINAPI DoDispPopupMenu(HWND,int,int);        //´´½¨µ¯³öʽ²Ëµ¥

VOID WINAPI DoDispMessage(int);              //ÏÔʾÏà¹ØÐÅÏ¢  

VOID WINAPI DoInsertMenuItem(void);          //ÏòÒÑÓв˵¥ÖвåÈëÐÂÏî

VOID WINAPI DoDeleteMenuItem(void);          //ɾ³ý²Ëµ¥ÖеÄÑ¡Ïî

VOID WINAPI DoCheckMenuItem(void);           //ÉèÖò˵¥ÏîΪѡÖбêÖ¾

VOID WINAPI DoCheckRadio(void);              //ÉèÖò˵¥ÏîΪµ¥Ñ¡±êÖ¾

VOID WINAPI DoInsertSysMenu(void);           //Ïòϵͳ²Ëµ¥ÖвåÈëÐÂÏî



char szAppName[]="Begin";

HINSTANCE hIns;

HWND hMainWnd;

BOOL isInsert;        //²åÈë²Ëµ¥±êÖ¾

BOOL isCheck;            //Ñ¡ÖбêÖ¾

int  idRadio=2;      //µ¥Ñ¡±êÖ¾



int APIENTRY WinMain(HINSTANCE hInstance,

                     HINSTANCE hPrevInstance,

                     LPSTR     lpCmdLine,

                     int       nCmdShow)

{

    MSG msg;

    HWND hWnd;

    WNDCLASSEX wc;

    wc.cbClsExtra                =0;

    wc.cbSize                    =sizeof(WNDCLASSEX);

    wc.cbWndExtra                =0;

    wc.hbrBackground         =(HBRUSH)GetStockObject(WHITE_BRUSH);

    wc.hCursor                   =LoadCursor(NULL,IDC_ARROW);

    wc.hIcon                    =LoadIcon(NULL,IDI_APPLICATION);

    wc.hIconSm                   =0;

    wc.hInstance             =hInstance;

    wc.lpfnWndProc               =(WNDPROC)MainProc;

    wc.lpszClassName         =szAppName;

    wc.lpszMenuName              =MAKEINTRESOURCE(IDR_MENU1);

    wc.style                    =CS_HREDRAW | CS_VREDRAW |

                                 CS_DBLCLKS | CS_OWNDC;

    RegisterClassEx(&wc);



    hWnd=CreateWindowEx(0,szAppName,szAppName,WS_OVERLAPPEDWINDOW,

        CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,

        NULL,NULL,hInstance,NULL);

    hMainWnd=hWnd;

    hIns=hInstance;

//ÔÚ´Ë´¦Ïòϵͳ²Ëµ¥ÖвåÈë²Ëµ¥Ïî

    DoInsertSysMenu();

    ShowWindow(hWnd,nCmdShow);

    UpdateWindow(hWnd);



    while(GetMessage(&msg,NULL,0,0))

    {

        TranslateMessage(&msg);

        DispatchMessage(&msg);

    }

    return msg.wParam;

}