The information in this article applies to:
SUMMARY
When you use the 320 by 200 CGA or MCGA graphics modes and a mouse,
the horizontal coordinates returned by the driver are from 0 to 638 in
increments of two.
MORE INFORMATION
Because the virtual screen for the mouse is in the range of 640 by 200
to 640 by 480, the virtual coordinate that maps to the actual screen
coordinate must therefore be double the actual. The vertical
coordinates in each case are 200 pixels, so there is a one-to-one
mapping of the virtual and actual coordinates.
"Microsoft Mouse Programmer's Reference Guide" Chapter 6 Additional query words: 7.00 7.03 7.04 7.05 8.00 8.10 8.20 9.00
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Last Reviewed: December 16, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |