ILockBytes::UnlockRegion

This method removes the access restriction on a range of bytes previously restricted with ILockBytes::LocRegion.

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.

Requirements

Runs on Versions Defined in Include Link to
Windows CE OS 2.0 and later Objbase.h    

Note   This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.

 Last updated on Tuesday, July 13, 2004

© 1992-2000 Microsoft Corporation. All rights reserved.