禁止运行程序多个实例-OnlyOneInst-对于编程的考虑，必不可少的，一般程序都要求只运行一个实例。这也节省了系统资源，供参考。-Prohibit running multiple instances of the program-OnlyOneInst-For programming considerations, essential, general procedures are required to run only one instance. This also saves sys