Returns the current value of the COMMAND_KEYBOARD field in the
       data access block (DAB). COMMAND_KEYBOARD is the keyboard used
       for command input.

       This function allows you to add other functions that access the
       features of the Screen Management Guidelines (SMG) of the Screen
       Management facility.

       This function is not available in a DECwindows Motif environment.

1  –  Input

       None.

2  –  Output

       A longword value of the COMMAND_KEYBOARD field.

3  –  Example

       DTR> DECLARE COMMAND_KEYBOARD LONG.
       DTR> COMMAND_KEYBOARD = FN$COMMAND_KEYBOARD