command definition

Group,

 

I'd like to create a command that requires user to enter one of 5 special
values (categories), i.e.:

 

Enter category . . . . . _______________  CAT1, CAT2, CAT3, CAT4, CAT5

 

Based on the category selected, additional required parameters would be
displayed underneath the first parameter, i.e.:

 

Enter category . . . . . *CAT1___________  CAT1, CAT2, CAT3, CAT4, CAT5

   Enter subparm1 . . . __________________ 

   Enter subparm2 . . . __________________

 

These parameters would be unique per category and would vary in number
depending on the category selected, so for *CAT2 selection they would see
something like this:

 

Enter category . . . . . *CAT2___________  CAT1, CAT2, CAT3, CAT4, CAT5

   Enter subparm3 . . . __________________ 

   Enter subparm4 . . . __________________

   Enter subparm5 . . . __________________

   Enter subparm6 . . . __________________

 

Ideally, I would not like other parameters to show even if F9 was hit.

Is it possible to do this in a single command source?  How would you go
about it?

 

Thanks for any pointers.

 

Elvis