Program help needed

[DrD]

Here's a shortened program construct that involves a CAS command:

Code:

EXPORT aa()
BEGIN
local x,y;
return grad(x^2-3*x*y^3,{x,y});
END;

Naturally, in CAS view grad(x^2-3*x*y^3,{x,y}); returns the desired output. (The program auto-initializes the variables to 0, resulting in non-sense at run time).

Changing to CAS.grad(x^2-3*x*y^3,{x,y}); doesn't work, either. A CAS program works, but this example is a fragment of a larger work, for which I would like to use the conn kit's program editor.

Two questions:

1. Can the above program be constructed to return the {x,y} result? --> [-3*y^3+2*x,-9*x*y^2]

2. I have read several posts describing CAS programming, but context is mostly dated around February 2014. With revisions, changes seem to have made creating a function: f(x):=anything, no longer show up in the [shift] [program] list, so cannot be edited therein. Is there another way to get CAS programs into the program editor?

Help appreciated!

-Dale-