Thanks, Phil!!!

This is exactly what I was trying to do at first time! I didn't find the ZOMM WINDOW command. Great!

>

define window wReport from 0,0 to 100,200 title "Window Title" system close
>activate window wReport
>zoom window wReport max
>
>REPORT FORM myreportname NOEJECT NOCONSOLE window wReport TO PRINT prompt preview in screen
>
>release window wReport