IProgressNotify
The IProgressNotify
interface enables applications and other objects to receive notifications of
changes in the progress of a downloading operation.
When to Implement
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.
When to Use
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
|
IUnknown
Methods |
Description |
|
QueryInterface |
Returns
pointers to supported interfaces. |
|
AddRef |
Increments
reference count. |
|
Release |
Decrements
reference count. |
|
IProgressNotify
Method |
Description |
|
OnProgress |
Receives
status information about progress of download operation. |