线程锁.Windows系统是多任务操作系统，系统内核为我们提供了

事件（Event）、Mutex、信号灯(semaphore)和计时器4种对象来控制线程间的同步。

在C＋＋Builder中，为我们提供了用于创建Event的TEvent对象供我们使用。-Thread lock. Windows system is a multi-tasking operating system kernel to provide us with the event (Event), Mutex, semaphores (semaphore) and four kinds of timer objects to control the inter-thread synchronization. In C　　 Builder, in order to provide us with the TEvent used to create the Event object for our use.