I don’t really understand what you are doing but I think I understand what you want to do.
You want to retrieve a value from a field on a certain form (that is placed in a tabpanel on another form).
And, you want to retrieve that value from within another form. Right?
If so you know the dataprovider of that field. Right?
If so, you can do ```
var value=forms.formname.dataprovidername
If you want to get a value from the text property of an element (it it has one), you have to give that element a name! After you did that you can do: