INT 2F - AD-DOS - GET AND RESET VxD API STATUS
AX = 0C20h
CF set
Return: AX = status
0000h successful
BX = VxD API Status
0000h no error
0001h error
0100h neither Windows 3.X enhanced mode nor
Windows/386 2.x is running
0200h VM API entry point found
0020h otherwise
Note:   this call resets the VxD API Status to zero
SeeAlso: AX=1607h

See also: 2F1602

2F0C20 - AD-DOS - GET AND RESET VxD API STATUS