The IProgressNotify interface enables applications and other objects to receive notifications of changes in the progress of a downloading operation.
You do not need to implement IProgressNotify. The downloading code implements this interface, and the asynchronous storage implementation provides a connection point for dispatching notifications to it. An application can also register an IProgressNotify sink to receive progress notifications for individual streams.
You do not need to call this interface. The Compound Files implementation uses IProgressNotify::OnProgress to control the blocking behavior of the asynchronous storage and to trigger additional byte range requests if applicable.
Methods in VTable Order
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IUnknown Methods |
Description |
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QueryInterface |
Returns pointers to supported interfaces. |
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AddRef |
Increments reference count. |
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Release |
Decrements reference count. |
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IProgressNotify Method |
Description |
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OnProgress |
Receives status information about progress of download operation. |