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ILockBytes::UnlockRegion
Removes the access restriction on a previously locked range of bytes.
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.
cb
[in]Specifies, in bytes, the length of the range that is restricted.
dwLockType
[in]Specifies the type of access restrictions previously placed on the range.
This parameter uses a value from the LOCKTYPE enumeration.
Return Values
S_OK
The byte range was unlocked.
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.
Comments
This method unlocks a region previously locked with the ILockBytes::LockRegion method. Locked regions must later be explicitly unlocked by calling ILockBytes::UnlockRegion with exactly the same values for the libOffset, cb, and dwLockType parameters. Two adjacent regions cannot be locked separately and then
unlocked with a single unlock call.
See Also
ILockBytes::LockRegion, LOCKTYPE
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