==== MFSH_UNLOCK - Unlock a segment ====

**Purpose**

Unlock a segment which was previous locked by calling //MFSH_LOCK//. 

**Calling Sequence**

<code c>
int far pascal MFSH_SEGREALLOC(ulHandle)

unsigned long ulHandle;
</code>

**Where**

//ulHandle// contains the handle returned from //MFSH_LOCK// of the segment to unlock. 

**Returns**

If no error is detected, a zero error code is returned. If an error is detected, the following error code is returned:   

  * ERROR_PROTECTION_VIOLATION -- the supplied address is invalid. 

**Remarks**

This helper is for use by a mini-FSD with an imbedded device driver. It is the same as the standard device driver helper UNLOCK.