Title: Visualage Building Guis for Existing Applications
Description: This document describes the process of building a graphical user interface
(GUI) for an existing host application. The document shows how a
developer can use a GUI front end to provide new application functions on
the workstation and access to workstation tools.

A simple application with one input and one output map is used to explain
the principles of host and workstation control for VisualAge EHLLAPI
applications. Different implementation approaches for GUI front-end
applications are investigated, evaluated, and documented. Conclusions and
recommendations are provided.

This document is written for application developers assigned the task of
writing GUI front ends for existing host applications using VisualAge's
EHLLAPI support. Some VisualAge knowledge is assumed.