NUMFKEY()
 Determines the number of function keys
------------------------------------------------------------------------------
 Syntax

     NUMFKEY() --> nTotalKeys

 Returns

     NUMFKEY() returns a value that corresponds to the number of available
     function keys.

 Description

     NUMFKEY() returns the number of function keys to use with SET FUNCTION
     nn TO.

 Note

     .  A value returned by NUMFKEY() is set to 40, both in CA-Clipper
        IBM driver and the CA-Clipper Tools Extended Drivers.  This does not
        change when you have an extended keyboard with 12 function keys.

 Example

     Display all the function key assignments:

     FOR nI = 1 TO NUMFKEY()
        ? CSETFUNC(nI)
     NEXT