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Running DOS Programs from NT 19
R
UNNING
DOS P
ROGRAMS FROM
NT
DOS mouse-driven programs run from Windows NT may also use the
touchscreen when run in a window.
Limited support for Full-screen DOS mode is provided. The video mode in
Windows NT and the video mode in the DOS application must be the same in
order for the cursor to correctly track your finger. If the video modes are not the
same the cursor will move as if out of calibration. A mouse can be used to access
all programs run in full-screen DOS mode.
T
IPS ON
P
UBLIC
A
CCESS
T
OUCHSCREEN
A
PPLICATIONS
If your touchscreen application is used in a public access setting such as an airport
kiosk, the following tips may be helpful:
1. Run the application full screen. Do not have a title bar, menu bar, etc.
2. Use bright background colors (never black) to hide fingerprints and reduce
glare. A patterned background, such as dithering, will also help the eye focus
on the image rather than reflections, especially in background areas where
there are no icons or menu choices. Fingerprints make a system look dirty and
unattractive.
3. Use a simple point-and-click interface with large buttons. Do not use
dragging, double clicks, scroll bars, drop-down menus, multiple windows, etc.
4. Turn off the cursor. Users will focus on the entire screen instead of the arrow.
The presence of a cursor makes the user subconsciously think "how do I get
the arrow to do what I want?" By removing the cursor, the user's
thinking/action is direct instead of indirect, unlocking the true power of
touchscreens.
5. Always give feedback to the user instantly on touch. A 3-D button effect
works well (such as a Windows standard button). Output a click sound, etc.
Clear the screen while searching for the next screen. Use an hourglass.
Immediate feedback is necessary because the touchscreen has no tactile
feedback mechanism.
6. Optimize the application for speed. A quick response keeps the user's
attention. Users will walk away from a sluggish system. Speedy systems also
reduce vandalism. Do not use a graphics mode with higher than necessary
colors/resolution. It will only slow down the system. (Use of 256 colors is
typically more important than resolution above 640x480.)