Int 2F Fn 1607  - Ms Windows - "vmd" Virtual Mouse Device Api              [W]

   AX = 1607h
   BX = 000Ch (VxD identifier of "VMD")

Return: CX = nonzero if mouse driver already virtualized

Note:  VMD (Virtual Mouse Driver) calls this and then checks whether CX is
     nonzero; if yes, it will not automatically virtualize the mouse
     driver.  This would be used if MOUSE.COM already virtualizes
     itself using the Windows API.

See Also: AX=1607h/BX=0014h,AX=1607h/BX=0015h