How to add dynamic menus to your application using DLLs

#include "stdafx.h"
#include "main.h"
// Linker directive to export MyExportedFunction, and in its completely 
// undecorated form 

_declspec(dllexport) int __cdecl NumberOfMenus()
{
	return NUMBER_OF_MENUS;
}
_declspec(dllexport) bool __cdecl MenuText(int n, CString& str)
{
	if (n < 0 || n>=NUMBER_OF_MENUS) return false;
	str.Format("Menu # %d",n);
	return true;
}
_declspec(dllexport) bool __cdecl MenuFunction(int n)
{
	if (n < 0 || n>=NUMBER_OF_MENUS) return false;
	CString str;
	str.Format("From DLL **********Menu #%d selected**********",n);
	MessageBox(NULL,str,"From DLL",MB_OK);
	return true;
}
_declspec(dllexport) bool __cdecl MenuTitle(CString& str)
{
	str="The DLL";
	return true;
}