Skip background print parameter screen

Hi,

My program has selection screen. This program should be able to execute in foreground and background manually. When every time execute it in background, the background print parameter screen always pop up to ask you fill in the "Output Device" and need to click the green check etc. My client would like to skip this screen, since output from background will be a file in the server. Can anyone know how to program in order to turn it off?

Thanks,

Meiying