download a file using windows IStream

问题:

I'm implementing dragging a virtual file out of a website and onto the desktop with an activex control.

How do I create an IStream on my http url, so Windows can execute the drop?

The example I'm looking at uses SHCreateStreamOnFile to copy a local file; there must be an analogous function for other types of streams like http file download.

回答1:

How about using the URL Moniker Functions. You can use the URLDownloadToFile (blocking function), or URLOpenPullStream (asynchronous).