User commands may be inspected by a user command exit program before being subsequently processed by the BCI. The BCIEXITC command is used to activate or deactivate a command exit, and has the following format:
BCIEXITC [ exit-name ]
Is the 1 to 8 character name of the program to be loaded as the user exit for the BCI. It must reside in a standard load library. Specifying the exit-name on the BCIEXITC command causes the module to be loaded only. It is not called until a command is next read from the input file.
If the exit name is omitted, any currently-executing exit is deactivated.
Only one command exit may be active at any one time. If you must invoke a different exit, first use a BCIEXITC command to deactivate the current exit.