[C++/Cx] How can I get the AsyncOperationWithProgress progress?

Windows Runtime provides the HttpClient class along with async APIs. For example, you can send a GET request through the GetAsync(Uri) method.

GetAsync() method is an awaitable API so that it returns IAsyncOperationWithProgress<HttpResponseMessage, HttpProgress>^. You will get the HttpResponseMessage by specifying the IAsyncOperationWithProgress to Concurrency::create_task(). However, how can I get the progress?

There’s no direct answer from MSDN but gives a hint here:

You just supply the delegate for the object’s Progress property

Here’s the snippet:

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