Description of Windows for Pen Computing Pens
ID: Q85663
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The information in this article applies to:
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Microsoft Windows for Pen Computing, versions 1.0, 1.0a
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Microsoft Windows versions 3.1, 3.11
SUMMARY
There are two types of pens used in the Windows for Pen operating system:
tethered, and untethered. They act similarly in every respect; the only
difference is that one is attached to the machine and the other is tethered
by a small cable.
Pen input devices must have an installable device driver, similar to a
mouse driver, in the SYSTEM.INI file to communicate with the system. There
are several distinct differences between mouse and pen drivers:
- Pen drivers must report x,y coordinate location information at much
higher resolutions than mice. Pens must record at least 120 events
per second and have a resolution of at least 200 spots per inch.
Pen data is reported to the Pen device driver (PENWIN.DLL) at
.0001 inch resolution. Though this resolution is not fully used at
this time, it allows for subsequent improvements in pen hardware.
- Pen drivers may also report pressure, angle of rotation, or other
pen state information.
- Pen drivers use a private interface to manage the high data rate,
thus avoiding a large amount of useless information.
In addition to the differences above, some pen device drivers have a
feature known as proximity sensing. This detects the x,y coordinate of
the pen without actually touching the tablet or screen.
Working in conjunction with the Pen device driver, Windows for Pen
also uses a special display driver that communicates with the Pen
device driver. This is required to allow a close interaction between
the use of the pen and the display of electronic ink on the screen.
Additional query words:
3.10 PENWIN
Keywords :
Version : :1.0,1.0a; WINDOWS:3.1,3.11
Platform : WINDOWS
Issue type :
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