Int 33 Fn 0026  - MS Mouse V6.26+ - Get Maximum Virtual Coordinates        [M]

   AX = 0026h

Return: BX = mouse-disabled flag (0000h mouse enabled, nonzero disabled)
   CX = maximum virtual X (for current video mode)
   DX = maximum virtual Y

Note:  for driver versions before 7.05, this call returns the currently-set
     maximum coordinates; v7.05+ returns the absolute maximum coordinates

See Also: AX=0031h