However, a callback operation is created to enable the process to return the result to the caller.
然而，创建回调操作使得流程能够将结果返回给调用者。
Long-running (receive with callback) indicates an interruptible process that communicates back to the caller by invoking a callback service.
Long - running (receivewithcallback)表明该流程为通过调用回叫服务与调用者通信的可中断性流程。
A process can get back to the caller either through a Reply activity, or through an Invoke activity wired to the appropriate callback service.
流程可以通过Reply活动或者与合适的回调服务相连的调用活动来返回调用方。
If, however, the callback function can be invoked after the call returns, the managed caller must take steps to ensure that the delegate remains uncollected until the callback function finishes.
然而，如果可以在调用返回后调用回调函数，则托管调用方必须采取相应的措施来确保委托在回调函数完成其工作之前不会被回收。
So, as is the case in the following enumeration example, the callback function completes its work before the call returns and requires no additional action by the managed caller.
因此，正如下面的枚举示例所示，回调函数会在调用返回前完成其工作，而无需托管调用方执行额外的操作。
Provides a callback mechanism for the type library converter to inform the caller of the status of the conversion, and involve the caller in the conversion process itself.
提供回调机制，以供类型库转换器向调用方通知转换的状态，并在转换过程本身之中涉及调用方。
Provides a callback mechanism for the type library converter to inform the caller of the status of the conversion, and involve the caller in the conversion process itself.
提供回调机制，以供类型库转换器向调用方通知转换的状态，并在转换过程本身之中涉及调用方。
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