关键是定位虚表的位置

#include "stdafx.h"

#include <windows.h>



class Base{

	

	public:

		virtual  void Print(){

			printf("gyarmy.com\n");

		}



};



void hookPrint(){

	printf("hook_gyarmy\n");

}





int main(int argc, char* argv[])

{	

	Base *pb = new Base();

	

	//关键定位虚表的位置

	DWORD *pVtAddr = (DWORD*)*(DWORD*)pb;



	DWORD dwOldProtect = 0;



	VirtualProtect(pVtAddr,4,PAGE_EXECUTE_READWRITE,&dwOldProtect);

	*pVtAddr = (DWORD)hookPrint;



	pb->Print();



	delete pb;

	

	return 0;

}