INT 15 - TopView - "GETBUF" - GET VIRTUAL SCREEN INFO
AX = 1024h
BX = segment of object handle for window
(0 = use default)
Return: ES:DI -> virtual screen
CX = size of virtual screen in bytes
DL = 00h text screen
01h graphics screen
SeeAlso: INT 21/AH=2Bh/CX=4445h

See also: 10FE

151024 - TopView - "GETBUF" - GET VIRTUAL SCREEN INFO