The sampling system is controlled by an adjustable program timer or by a manual pushbutton.
取样系统用可调程序定时器或手动操作的按纽控制。
In a long-running program, the Timer is probably best created as a daemon thread (using the constructors that take a Boolean parameter to indicate daemon status), so it won't keep the VM alive.
在长时间运行的程序中，最好创建一个Timer守护线程(使用带有指示守护线程状态的参数的构造函数)，从而它不会让VM活动。
If Application.DoEvents is called from your code, your program flow may be interrupted in order to process the timer events generated by an instance of this class.
如果为了处理由该定时器类产生的定时器事件而在你的代码中有一个Application . DoEvents的调用，你的程序流程可能会被打断。
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