7
Q u i c k R e f e r e n c e
Touch-Based Applications
The VRC 5000 is available in both touchscreen and standard (non-
touchscreen) models. For touch-based applications, the video screen
displays graphical icons whose corresponding functions are
activated when touched by a user. Touch-based applications can be
divided into two different categories:
•
Graphical User Interface (GUI) applications, based on a GUI
operating system, such as Windows
•
DOS-based applications.
For GUI applications, a “mouse-like” touch driver allows standard
applications to be executed. However, for ease of use, applications
should:
•
use only one button
•
avoid double-clicks whenever possible
•
keep touch targets large (for example, scroll bars are very dif-
ficult to see).
With these provisions, applications can be developed using standard
tools and practices including Visual C++, Visual Basic, etc.
Touch-based applications are composed of an application program,
a touch library, and a graphics library. Each of these is described in
detail in the VRC 4000/5000 Product Reference Guide.
