Unlocks the License File
Declare Function pp_lfunlock(ByVal handle As Long) As Long
LONG pp_lfunlock(LONG handle)
<handle> is the handle to the License File given by pp_lfopen()
Refer to pp_errorstr() for a table of possible return codes and their meaning. Typically, PP_SUCCESS  (file was unlocked) is returned.
Unlocks the License File that was previously locked by pp_lflock().
Refer to pp_lflock() for an example of locking and unlocking a License File.
PP_LFOPEN() and PP_LFLOCK()