.. * Set the printer to the new options DocumentProperties(hWindow, hPrinter, cPrinter, @cModifiedDevmode, @cModifiedDevmode, DM_IN_BUFFER+DM_OUT_BUFFER) * try changing the above to: DocumentProperties(hWindow, hPrinter, cPrinter, @cModifiedDevmode, @cOrigDevmode, DM_IN_BUFFER+DM_OUT_BUFFER) i think the devmodes structures have to be unequal so the printer gets updated .. * Showing printer settings dialog again to see if the settings took * This dialog comes up with the tray settings I chose previously DocumentProperties(hWindow, hPrinter, cPrinter, @cModifiedDevmode, @cModifiedDevmode, DM_IN_PROMPT+DM_IN_BUFFER+DM_OUT_BUFFER) *DocumentProperties dialog takes the settings from the passed in DEVMODE, *that's why the tray is the same as the one you selected previously. *To verify that options are persisted to the printer settings try this *instead DocumentProperties(hWindow, hPrinter, cPrinter,0,0,DM_IN_PROMPT)Regards