函数-判断程序是否运行

/// <summary>
/// 判断是否重复运行
/// </summary>
/// <returns>FALSE 没运行，TRUE 已运行</returns>
BOOL IsAlreadyRun()
{
    HANDLE hMutex = NULL;
    hMutex = ::CreateMutex(NULL, FALSE, "TEST");
    if (hMutex)
    {
        if (ERROR_ALREADY_EXISTS == ::GetLastError())
        {
            return TRUE;
        }
    }
    return FALSE;
}