This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for

For applications that download multiple files or handle multiple tasks, waiting for each task to complete before moving on to the next task can be extremely inefficient. To avoid waiting, many of the Windows Internet Services (WinInet) functions provide a way to perform tasks asynchronously.

See Also