Unlock

Removes a previous access restriction (lock) on a file

Syntax
	Unlock #filenum, record
	Unlock #filenum, start To end

Parameters
	filenum
		The file number used to KeyPgOpenOpen the file.
	record
		The record (KeyPgRandomRandom files) to unlock.
	start
		The first byte position (KeyPgBinaryBinary files) in a range to unlock.
	end
		The last byte position (KeyPgBinaryBinary files) in a range to unlock.

Description
	Unlock removes the temporary access restriction set by KeyPgLockLock.

	It is strongly recommended to use the same arguments used in the 
	previous KeyPgLockLock.

	Note: This command does not always work, neither as documented nor as 
	expected. It appears to be broken at the moment.

Example
		 For an example see KeyPgLockLock.

Differences from QB
	* Currently, FB cannot implicitly unlock the entire file
	* In KeyPgRandomRandom mode, FB cannot unlock a range of records

See also
	* KeyPgLockLock
	* KeyPgOpenOpen
	* KeyPgScreenunlockScreenUnlock

