INPUT in NAV 2009

Atreiu

Hello,
this is my problem:
- in the page "P" I can create a new record throug a function
- I need to have an input dialog box to define a field called "F" before finishing the process
- in the classic client I could use the INPUT function, but not in NAV 2009.
- how can I create the page InputBox (without a table under it) to get this input?
- how can I pass 2 variables from page P to page InputBox (Document No. and Line No.)?

I'm not so skillful in C/AL so am asking your help for a simple solution

thanks!