>When I want to make some printing works I need to check whether the printer is ready or not. When I turn the printer on and then off, printstatus() returns the same value (.T.). What is really happening?

Since the printer is controlled by Windows, the old PRINTSTATUS() function (which was mainly for use by DOS), no longer applies. Only the Windows spooler knows the status, it just tells the rest of the world everything is OK, hence PRINTSTATUS() sees .T. If the printer is unavailable, Windows will spool everything up to be printed later, when the printer is available.