Int 16/AX=FA07h/DX=5945h

AX = FA07h
DX = 5945h
BL = new state
00h don't monitor
01h monitor network drives

Return:
CF clear
DI = 4559h

Note: VWATCH v2.1 (from PC Tools 9.0) returns CF set instead

See Also: AX=FA00h - AX=FA06h