Hello.. Please help...

My problem is that I need to have a function contained in module 'jfunction.bas' to be supplied by the user at run time. The module reads in a function F(I) in terms of variables X(I,... ):

' ------------------------------------------------
Public Sub JFUNC(N, M, K, X(), F(), I)
F(I) = X(I, 1) * X(I, 2) * X(I, 3)
End Sub
' ------------------------------------------------

Is it possible to make this module show up during execution and then be edited by the user? (Note: the user can edit only line 2 and can type in any combination of the Xs, leaving the I index intact.)

Joe Back