SetIoProgress (Compact 2013)
This function is used by an asynchronous device driver to update the status and progress on an asynchronous I/O request.
[in] Handle of the asynchronous I/O operation. This handle is returned from the call toCreateAsyncIoHandle.
[in] Current number of completed bytes.
Nonzero indicates success. Zero indicates failure. For extended error information, call GetLastError.
This function can be called multiple times in any thread to update the current actual number of I/O bytes transferred.