临界区结构对象
CRITICAL_SECTION;
//初始化临界区
InitializeCriticalSection(&Section)
//进入临界区
EnterCriticalSection(&Section)
//尝试进入临界区
TryEnterCriticalSection(&Section)
//离开临界区
LeaveCriticalSection(&Section)
//删除临界区
DeleteCriticalSection(&Section)