IStream::UnlockRegion 9FWMIA

Removes the access restriction on a range of bytes previously restricted with IStream::LockRegion12WH31X.

HRESULT UnlockRegion(

ULARGE_INTEGER libOffset,	//Specifies the byte offset for the beginning of the range
ULARGE_INTEGER cb,	//Specifies the length of the range in bytes
DWORD dwLockType	//Specifies the access restriction previously placed on the range
);

Parameters

libOffset

[in] Specifies the byte offset for the beginning of the range.

[in] Specifies, in bytes, the length of the range to be restricted.

dwLockType

[in] Specifies the access restrictions previously placed on the range.

Return Values

S_OK

The byte range was unlocked.

E_PENDING

Asynchronous Storage only: Part or all of the stream s data is currently unavailable. For more information see IFillLockBytes194LHM2 and Asynchronous Storage27PL.UQ.

STG_E_INVALIDFUNCTION

Locking is not supported at all or the specific type of lock requested is not supported.

STG_E_LOCKVIOLATION

The requested unlock cannot be granted.

STG_E_REVERTED

The object has been invalidated by a revert operation above it in the transaction tree.

Remarks

IStream::UnlockRegion unlocks a region previously locked with the IStream::LockRegion12WH31X method. Locked regions must later be explicitly unlocked by calling IStream::UnlockRegion with exactly the same values for the libOffset, cb, and dwLockType parameters. The region must be unlocked before the stream is released. Two adjacent regions cannot be locked separately and then unlocked with a single unlock call.

See Also

IStream - Compound File ImplementationAQSJQX, LOCKTYPER03AHX, IStream::LockRegion12WH31X