Thanks Crescencio for your help.

I was cheking out the IC combobox and the only way that I could resolve the trouble was making a public variable.

At final this is the code.
At form init:
public codigo

At combobox 1:
codigo=this.value
select aimtabd1
set filter to codimp=codigo
select aimtabd2
set filter to codimp=codigo
sele tabmov

The unique trouble that I have is when the user go to the next record the prewie record in the combobox desapear.

What is your advise..???