ResetEvent is a procedure used to ensure that signals posted to the waitable event handle in the class instance are cleared. 

ResetEvent examines the internal handle to determine its' class type, and casts the handle prior to calling the Reset method from the Framework class library. 

Use SetEvent to post a signal to the waitable event handle. 

Use WaitFor to retrieve the result from the waitable event handler.

SetEvent 

WaitFor