#pragma once

#include <map>

#include <string>

class DynBase;

struct ClassInfo;

bool Register(ClassInfo* ci);

typedef DynBase* (*funCreateObject)();

//Assistant class to create object dynamicly

struct ClassInfo

{

public:

       string Type;

       funCreateObject Fun;

       ClassInfo(string type, funCreateObject fun)

       {

              Type = type;

              Fun = fun;

              Register(this);

       }

};

//The base class of dynamic created class.

//If you want to create a instance of a class ,you must let

//the class derive from the DynBase.

class DynBase

{

public:

       static bool Register(ClassInfo* classInfo);

       static DynBase* CreateObject(string type);

private:

       static std::map<string,ClassInfo*> m_classInfoMap;

};

#include "stdafx.h"

#include "DynBase.h"

std::map< string,ClassInfo*> DynBase::m_classInfoMap = std::map< string,ClassInfo*>();

bool DynBase::Register(ClassInfo* classInfo)

{

       m_classInfoMap[classInfo->Type] = classInfo;

       return true;

}

DynBase* DynBase::CreateObject(string type)

{

       if ( m_classInfoMap[type] != NULL )

       {

              return m_classInfoMap[type]->Fun();

       }

       return NULL;

}

bool Register(ClassInfo* ci)

{

       return DynBase::Register(ci);

}

class DerivedClass : public DynBase

{

public:

       virtual ~ DerivedClass ();

       DerivedClass ();

       static DynBase* CreateObject(){return new DerivedClass ();}

private:

       static ClassInfo* m_cInfo;

};

#include "stdafx.h"

#include "DynBase.h"

#include "DerivedClass.h"

DerivedClass::~ DerivedClass ()

{

       // ToDo: Add your specialized code here and/or call the base class

}

DerivedClass:: DerivedClass ()

{

}

ClassInfo* DerivedClass::m_cInfo = new ClassInfo(“DerivedClass”,(funCreateObject)( DerivedClass::CreateObject));

int _tmain(int argc, _TCHAR* argv[])

{

       DerivedClass * instance = (DerivedClass *)DynBase::CreateObject(“DerivedClass”);

    //do something

       system("pause");

      return 0;

}