Allows (or disallows) the command cursor to move to the specified AN or to all ANs. The command cursor normally moves only to ANs that have commands defined.
The AN where the command cursor can move. If 0, all ANs are implied.
0 - Do not allow the cursor to move to this AN.
1 - Allow the cursor to move to this AN.
0 (zero) if successful, otherwise an error is returned.
! Allows the command cursor to move to AN20.
! Allows the command cursor to move to any AN.