修改内存地址内容，可以修改游戏金币值

实现修改内存内容核心代码：

//进程列表信息
void CMemRepairDlg::InitProcessList()
{
	PROCESSENTRY32 pe32;
	ZeroMemory(&pe32, 0);
	pe32.dwSize = sizeof(PROCESSENTRY32);
	//对系统进程进行拍照
	HANDLE handle = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
	if ( INVALID_HANDLE_VALUE == handle  )
	{
		MessageBox("调用CreateToolhelp32Snapshot函数失败!");
		return;
	}
	
	BOOL bRect = ::Process32First(handle, &pe32);

	if ( m_map.size() > 0)
		m_map.clear();//清除
	CString cs;

	while( bRect )
	{
		((CComboBox*)GetDlgItem(IDC_PROCESSLIST_COBOX))->AddString(pe32.szExeFile);
		m_map.insert(std::pair<DWORD, CString>(pe32.th32ProcessID, pe32.szExeFile));
		
		bRect = ::Process32Next(handle, &pe32);
	}
	((CComboBox*)GetDlgItem(IDC_PROCESSLIST_COBOX))->SetCurSel(3);

	//GetModuleFileNameEX::检索当前进程路径
	UpdateData(FALSE);
	CloseHandle(handle);
}

//获取当前进程句柄
void CMemRepairDlg::GetCurrentProcessHandle()
{
	int nIndex = ((CComboBox*)GetDlgItem(IDC_PROCESSLIST_COBOX))->GetCurSel();
	CString processStr = "";
	((CComboBox*)GetDlgItem(IDC_PROCESSLIST_COBOX))->GetLBText(nIndex, processStr);
	
	DWORD processId = 0;

	if ( m_map.size() > 0 )
	{
		std::map<DWORD, CString>::iterator iterator;
		for( iterator=m_map.begin();iterator != m_map.end();++iterator )
		{
			if ( !processStr.Compare(iterator->second) )
			{
				processId = iterator->first;
				break;
			}
		}
	}
	if ( processId == 0 ) return;
	m_handle = ::OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId);

	if ( m_handle == NULL )
	{
		CString errorInfo;
		errorInfo.Format("error code:%d 调用函数失败!", GetLastError);
		MessageBox(errorInfo);
		return;
	}
	
}
//读取一页内存
void CMemRepairDlg::ReadOnePageMem(DWORD baseptr, const char* pStr)
{
	BYTE byte[4096] = {0};
	//lpBaseptr：起始地址
	BOOL bRect = ::ReadProcessMemory(m_handle, (LPCVOID)baseptr, byte, 4096, NULL);

	LPDWORD ptr = NULL;
	if ( bRect )
	{
		for( int i = 0;i < 4*1024-3;++i )
		{
			ptr = (DWORD*)&byte[i];
			if ( *ptr == atoi(pStr) )
			{
				m_vector.push_back(baseptr+i);
			}
		}
	}
	
}

//获取操作系统用于存储数据的地址
void CMemRepairDlg::GetBasePtr(const char* pStr)
{
	OSVERSIONINFO osInfo;
	ZeroMemory(&osInfo, sizeof(OSVERSIONINFO));
	osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	::GetVersionEx(&osInfo);
	DWORD baseAddr = 0;
	if ( osInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS )//98
	{
		baseAddr = 4*1024*1024;//98系统是采用的是4M
	}
	else
	{
		baseAddr = 64*1024;
	}

	if ( m_vector.size() > 0)
		m_vector.clear();
	//在开始地址到2G内存空间进行查找
	for( ;baseAddr < 2*1024*1024*1024;baseAddr+=4*1024 )
	{
		ReadOnePageMem(baseAddr, pStr);
	}
}

//通过输入值找到当前进程中内存地址
void CMemRepairDlg::OnSearchBtn() 
{
	// TODO: Add your control notification handler code here
	GetCurrentProcessHandle();
	((CEdit*)GetDlgItem(IDC_VALUE_EDIT))->GetWindowText(m_value);
	GetBasePtr(m_value.GetBuffer(m_value.GetLength()));
	OperatorListBox();

}

//地址列表控件操作
void CMemRepairDlg::OperatorListBox()
{
	CListBox* listBox = (CListBox*)GetDlgItem(IDC_PROCESS_LIST);
	std::vector<DWORD>::iterator itrator;
	
	listBox->ResetContent();
	CString str;
	for( itrator = m_vector.begin();itrator != m_vector.end();++itrator )
	{
		str.Format("%p", *itrator);
		listBox->AddString(str);
	}

	UpdateData(FALSE);
}

void CMemRepairDlg::OnSelchangeProcessList() 
{
	// TODO: Add your control notification handler code here
	CListBox* listBox = (CListBox*)GetDlgItem(IDC_PROCESS_LIST);
	int nIndex = ((CListBox*)GetDlgItem(IDC_PROCESS_LIST))->GetCurSel();
	CString strItem;
	listBox->GetText(nIndex, strItem);
	((CEdit*)GetDlgItem(IDC_ADDR_EDIT))->SetWindowText(strItem);
	UpdateData(FALSE);
}

//从指定的内存范围内进行搜索
void CMemRepairDlg::OnStartBtn() 
{
	// TODO: Add your control notification handler code here
	int nSize = m_vector.size();

	DWORD dwValue;
	if ( m_nextVector.size() > 0 )
		m_nextVector.clear();
	std::vector<DWORD>::iterator iterator;
	for( iterator = m_vector.begin(); iterator != m_vector.end();++iterator )
	{
		BOOL bRect = ::ReadProcessMemory(m_handle, (LPCVOID)*iterator, &dwValue, sizeof(DWORD), NULL);
		if (bRect)
		{
			if ( dwValue == atoi(m_value.GetBuffer(m_value.GetLength())) )//内存的内容与输入的值相等
			{
				m_nextVector.push_back(*iterator);
			}
		}
	}

	m_vector.clear();
	m_vector = m_nextVector;

	OperatorListBox();

}

//修改内存内容
void CMemRepairDlg::OnModifyBtn() 
{
	// TODO: Add your control notification handler code here
	CString addrStr = "";
	CString modifyStr = "";

	((CEdit*)GetDlgItem(IDC_ADDR_EDIT))->GetWindowText(addrStr);//需要修改的地址
	((CEdit*)GetDlgItem(IDC_MODIFY_EDIT))->GetWindowText(modifyStr);
		MessageBox(addrStr);
	
	DWORD dwValue = atoi(modifyStr.GetBuffer(modifyStr.GetLength()));
	DWORD addr = HexToNum(addrStr);;
	
	BOOL bRect = ::WriteProcessMemory(m_handle,(LPVOID)addr, &dwValue, sizeof(DWORD), NULL);
	if ( bRect )
		MessageBox("修改成功!");
	else
	{
		int nCode = GetLastError();
		CString errorInfo;
		errorInfo.Format("%d   错语码：%d", addr, nCode);
		MessageBox(errorInfo);
	}
}

//十六进制转化为十进制
DWORD CMemRepairDlg::HexToNum(CString str)
{
	int nSum = 0;
	int nLength = str.GetLength();
	int i = 0;
	int nTemp = 0;
	
	do 
	{
		TCHAR cChar = str.GetAt(--nLength);
		switch(cChar)
		{
			case 'A':
			case 'a':
				nTemp = 10;
				break;
			case 'B':
			case 'b':
				nTemp = 11;
				break;
			case 'C':
			case 'c':
				nTemp = 12;
				break;
			case 'D':
			case 'd':
				nTemp = 13;
				break;
			case 'E':
			case 'e':
				nTemp = 14;
				break;
			case 'F':
			case 'f':
				nTemp = 15;
				break;
			default:
				nTemp = cChar - 48;
				break;

		}
		nSum += nTemp*pow(16, i);

		++i;
	} while (nLength  > 0);

	return nSum;
}