Int 20  P - Microsoft Windows - Vfd - Vxd Services                         [W]

   VxD = 001Bh

Note:  the desired VxD and service number are identified by the data
     immediately following the INT 20 instruction, as in:
       INT 20h
       DW  service number
       DW  VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#0982,#1032

(Table 0982)
Values for VFD (VxD ID 001Bh) service number:
 0000h get version

See Also: #0981,#0983