This method removes the access restriction on a range of bytes previously restricted with ILockBytes::LocRegion.
At a Glance
| Header file: | Objbase.h |
| Windows CE versions: | 2.0 and later |
Syntax
HRESULT UnlockRegion( ULARGE_INTEGER libOffset,
ULARGE_INTEGER cb, DWORD dwLockType );
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
One of the values described in the following table is returned.
| Value | Description |
| 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. |
Remarks
ILockBytes::UnlockRegion unlocks a region previously locked with a call to ILockBytes::LockRegion. Each region locked must be explicitly unlocked, using the same values for the libOffset, cb, and dwLockType parameters as in the matching calls to ILockBytes::LockRegion. Two adjacent regions cannot be locked separately and then unlocked with a single unlock call.