INT 2F - Kingswood TSR Windows - HIDE WINDOWS
AX = 3901h
BL = 03h
Return: AX = error code (0000h if successful)
Notes:  Hide any visible TSR windows from view.
SeeAlso: AX=3901h/BL=02h,AX=3901h/BL=05h

See also: 2F39

2F3901BL03 - Kingswood TSR Windows - HIDE WINDOWS