// Test.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <windows.h>


BOOL EnablePriviledge();
typedef struct _MyData
{
	char szWord[12];
	DWORD pMyBox;
} MyData;

static DWORD _stdcall MyFunc(MyData * myd)
{
	typedef int (*pMyMessageBox)(HWND,LPCTSTR,LPCTSTR,UINT);
	pMyMessageBox MyMessageBox;
	MyMessageBox = (pMyMessageBox)myd->pMyBox;
	MyMessageBox(NULL,myd->szWord,myd->szWord,NULL);
	return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
	EnablePriviledge();
	DWORD dwProcID;
	MyData mydata;
	strcpy(mydata.szWord,"ab");
	HMODULE hMessage = LoadLibrary("user32.dll");
	DWORD dwAddress = (DWORD)GetProcAddress(hMessage,"MessageBoxA");
	FreeLibrary(hMessage);
	mydata.pMyBox = dwAddress;
	HWND hNotepad = FindWindow("Notepad",NULL);
	if (NULL == hNotepad)
	{
		MessageBox(NULL,NULL,NULL,NULL);
		return 1;
	}
	GetWindowThreadProcessId(hNotepad,&dwProcID);
	HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS,NULL,dwProcID);
	if (NULL == hProcess)
	{
		MessageBox(NULL,NULL,NULL,NULL);
		return 2;
	}	
	void * dwProcAddress = VirtualAllocEx(hProcess,
		0,
		1000,
		MEM_COMMIT ,
		PAGE_EXECUTE_READWRITE);
	if (NULL == dwProcAddress)
	{
		MessageBox(NULL,NULL,NULL,NULL);
		return 4;
	}
	if(0 == WriteProcessMemory(hProcess,dwProcAddress,&MyFunc,1000,NULL))
	{
		MessageBox(NULL,NULL,NULL,NULL);
		return 4;
	}
	MyData * dwDataAddress = (MyData *)VirtualAllocEx(hProcess,
		0,
		sizeof(MyData),
		MEM_COMMIT| MEM_RESERVE,
		PAGE_READWRITE);
	if (NULL == dwDataAddress)
	{
		MessageBox(NULL,NULL,NULL,NULL);
		return 3;
	}
	if(0 == WriteProcessMemory(hProcess,dwDataAddress,&mydata,sizeof(MyData),NULL))
	{
		MessageBox(NULL,NULL,NULL,NULL);
		return 4;
	}

	HANDLE hRemoteThread = CreateRemoteThread(hProcess,
		0,
		0,
		(LPTHREAD_START_ROUTINE)dwProcAddress,
		dwDataAddress,
		0,
		&dwProcID);
//	VirtualFreeEx(hProcess,dwProcAddress,1000,MEM_DECOMMIT|MEM_RELEASE);
//	VirtualFreeEx(hProcess,dwDataAddress,sizeof(MyData),MEM_DECOMMIT);
	CloseHandle(hProcess);
	CloseHandle(hRemoteThread);
	return 0;
}

BOOL EnablePriviledge()
{
	HANDLE hToken;
	TOKEN_PRIVILEGES tkp;
	tkp.PrivilegeCount = 1;
	if(TRUE == OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES,&hToken))
	{
		LookupPrivilegeValue(NULL,SE_DEBUG_NAME,&tkp.Privileges[0].Luid);
		tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
		AdjustTokenPrivileges(hToken,FALSE,&tkp,sizeof(TOKEN_PRIVILEGES),NULL,NULL);
		CloseHandle(hToken);
		return TRUE;
	}
	else
		return FALSE;
}

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