How to create a touch button [HP Prime]

[uklo]

Hello, i want to create a touch button to use in Home, and/or CAS mode.

For example, i want to change quickly the number format, in a program like this:

EXPORT eng()

BEGIN

HFormat:=3;

END;

and i want to have a button called "eng" like the button "Sto" or "simplif" (in CAS mode).
Is that possible?

Thanks.

Edited: 2 Nov 2013, 2:02 p.m.

[Marcus von Cube, Germany]

You can create menus in a program but they persist only while the program has control. Reading a softkey seems to be a little complicated because you need to parse the output of MOUSE().

It might be easier to redefine the keyboard.