这个程序是我尝试使用dll共享内存段的代码。当多个程序调用dll时，dll中会产生一块所有程序可以访问的内存块，可用于用于进程通信和控制。-this procedure is to try to use the shared memory of the dll code. When the number of procedures called dll, dll will have an all procedures can access blocks of memory, process ca