In a parametrized view, Wich is better?

1. ?thisform.property
2. ?lvariable (global or local)

The scenario is:

A form that can be instatiated more than one time, and the requerys goes in some procedures of this form.

I'm for the 1 solution, the only lack I think is that I wouldn't be able to REQUERY this in a program, but I don't have problem with that, cause all my actions occurs inside a form.

Don't know where I hear that doing with a forms property I will got a loose of perfomance... I tested this and got similar results in time.

Can you tell me how are you doing?

Thanks in advance