禁止程序多开，如程序已运行但最小化时，如重复运行程序则自动还原已运行窗口-No more procedures, such as the program has been run but when minimized, such as repeated operation program will automatically restore operation window

利用创建互斥体来防止/禁止程序重复运行。(Using a mutex to prevent / forbid programs from running repeatedly.)