Or rather _SCREEN.Visible = .F. of course.

> SCREEN = OFF on Config.Fpw only works in running EXE File. You should have a Form with ShowWindow property set to As Top Level (SDI) to make it work. In this way, the said form will work as your Main Window. All sub-forms (child forms) therefore should have a ShowWindow property set to In-Top Level.

> If you do not want to use SDI, issue _SCREEN.VISIBLE = .T. or APPLICATION.VISIBLE = .T. on the main.prg, and everything will work fine.