Pulling my Hair out...

I have a Parameterized View that calls for Variable
iCustomer... In the View I have a ?iCustomer in the
Filter Expression section. Where on the FORM do
I place the code that says iCustomer=0 (For the
first run through) so it doesnt prompt me for the
Customer # everytime I run the form?

Thanx for any advice (On the Code, Not the Hair :-))
Bob