To be honest, I'm far for being able to write anything. Don't have any experience at that. Any help you could provide me would be very much appreciated. Nothing appears on the screen but, as I said, R&R XBase or R&R Convert are taking focus when I give order to print receipt. At least, guy who wrote POS program says so. We have to use R&R to solve problem of printing local alphabet letters on receipts, problem that appeared when I transferred application from pure DOS machine to WinXP. And when I said "full screen", I mean ALT+ENTER full screen. At the moment I use it windowed but it's tiny compared to full screen (cannot be maximized over entire screen without messing up appearance of application) and it's slower when windowed (letters typing lag a bit, etc.).