You have to use get and set-commands:
will return the text in the field "my_textfield".
If you want to write into the field:
textstring = 'blabla';
Good luck (it's a bit hard at the beginning, but when you get used to
it, it becomes pretty simple!),
> I designed a GUI with guide and now I want to fill up the fields
> during the calculation.
> I do not understand it with the handles and how I can attach a
> variable with such a field.
> An easy to understand example would be very helpful.
> Thx a lot