一些MFC的函数及使用方法：多线程操作变量时，锁定变量；将程序推送到最顶端（非置顶）；将字符串按某字符或字符串进行分割；获取系统时间；获取程序运行目录。-Some MFC function and method of use: multi-threaded operating variables, the lock variable program pushed to the top (top) string according to a particular character or st