当服务器不再希望在端点中注册时,调用这个例程。
When the server no longer wants to be registered with the endpoint, this routine is called.
有许多可以为其注册回调例程的操作,这个参数值指出了每个以EM _开头的操作(完整列表可以从api参考指导中获得)。
There are a number of operations that you can register callback routines for and the value to indicate each operation begins with EM_ (the complete list is available in the API reference guide).
在注册回调例程之前,使用EMCreateRecursionID函数获得一个递归id很有用。
Before registering the callback routine, it is useful to obtain a recursion ID using the EMCreateRecursionID function.
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