让程序只可在一台电脑上运行一个程序实例，C++如何做到的，利用MMF(内存映像文件)来检测，通过其提供的CSingleInstance类，设置exe可执行程序只有一个实例，如何检测一个程序的拷贝正在运行是一个古老的问题，这个例子利用MMF确实值得推荐。-Let the program can only run one instance on a computer, C++ how to do, using MMF (memory image file) to detect, provided by CSingleInstance its class, set only one instance of exe executable program, how to detect a program the copy is running is an old problem, in this case the use of MMF really worth recommending.