Int 2F Fn F200  - Winx - Installation Check                                [W]

   AX = F200h

Return: AX = 00FFh if installed
Program: WINX is a DOS/Windows utilities by Al Williams which can be used to
     launch Windows applications from a DOS Box; it was published in
     "DOS and Windows Protected Mode-Programming with DOS Extenders"
     (Addison-Wesley) and should not be confused with the Windows driver
     of the same name which is part of the DESQview/X package