检测是否打开多个同一软件

//多开检测
bool MultRunChecker(TSTRING strKey);

//多开检测
if (!MultRunChecker((_T("XXXXXX"))))
{
	return 1;
}

bool MultRunChecker(TSTRING strKey)
{
	HANDLE hMutex = CreateMutex(NULL, FALSE, strKey.c_str());
	if (GetLastError() == ERROR_ALREADY_EXISTS)
	{//已有实例在运行

	 //将已经运行的实例置顶
		HWND hWnd = ::FindWindow(NULL, strKey.c_str());
		::SetWindowPos(hWnd, HWND_TOP, -1, -1, -1, -1, SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOMOVE | SWP_NOOWNERZORDER);
		::ShowWindow(hWnd, SW_SHOWMINIMIZED);
		::SetForegroundWindow(hWnd);
		::ShowWindow(hWnd, SW_SHOWNORMAL);

		Sleep(10);
		if (::GetForegroundWindow() != hWnd)
		{//如果置顶失败，则可能是残留进程，强制终止原有进程
			TSTRING strExe = strKey + _T(".exe");
			DWORD Pid = GetProcessidFromName(strExe.c_str());

			HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, Pid);
			if (hProcess)
			{
				if (TerminateProcess(hProcess, 0))
				{
					return true;
				}
			}
		}

		return false;
	}

	return true;
}



//获取线程ID
DWORD GetProcessidFromName(LPCTSTR name)
{
	PROCESSENTRY32 pe;
	DWORD id = 0;
	HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
	pe.dwSize = sizeof(PROCESSENTRY32);
	if (!Process32First(hSnapshot, &pe))
		return 0;
	while (1)
	{
		pe.dwSize = sizeof(PROCESSENTRY32);
		if (Process32Next(hSnapshot, &pe) == FALSE)
			break;
		if (StrCmpW(pe.szExeFile, name) == 0)
		{
			id = pe.th32ProcessID;

			break;
		}
	}
	CloseHandle(hSnapshot);
	return id;
}