BIOS / Int / Int 15 / 12/12


   INT 15 - TopView - SEND MESSAGE - "GETSCALE" - GET  POINTER SCALE FACTOR

Input			Output
AX	12h			AX
BX	12h	00h		BX
CX				CX
DX				DX
Stack	DWORD Object Handle to Pointer			ES:DI

Return: STACK: DWORD pointer pos scaled as if window were this
                     many columns wide
               DWORD pointer pos scaled as if window were this many rows high