IBackgroundCopyFile6::UpdateDownloadPosition method (bits10_1.h)

Specifies a position to prioritize downloading missing data from.


HRESULT UpdateDownloadPosition(
  [in] UINT64 offset


[in] offset

Specifies the new position to prioritize downloading missing data from.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. It will return BG_E_RANDOM_ACCESS_NOT_SUPPORTED if the job does not meet the requirements of a BITS_JOB_PROPERTY_ON_DEMAND_MODE job.


UpdateDownloadPosition can be requested for any download job that also meets the requirements for BITS_JOB_PROPERTY_ON_DEMAND_MODE jobs.

The requirements for a BITS_JOB_PROPERTY_ON_DEMAND_MODE job is that the transfer must be a DOWNLOAD job. The job must not be DYNAMIC and the server must be an HTTP or HTTPS server and the server requirements for range support must all be met. For more information, see HTTP Requirements for BITS Downloads.


Minimum supported client Windows 10, version 1703 [desktop apps only]
Minimum supported server Windows Server 2016 [desktop apps only]
Target Platform Windows
Header bits10_1.h (include Bits.h)
Library Bits.lib

See also