HP 3000 Manuals

HP ALLBASE/4GL Developer Self-Paced Training Guide

Application Structure 

Once again, the application uses the concept of a process calling a
screen.  Functions associated with fields on the screen perform the
necessary file look-up operations.  When the user terminates the screen,
control returns to the original process which then performs the
appropriate file update operations.

Product/Option Application 

In the product/option application, the functions associated with screen
fields or screen function keys can also display one of three different
windows on the screen.  Other functions called by function keys display
data in a scroll area on the screen.

The structure of the application can be shown diagrammatically as
follows.


          Diagramatic Structure of the Enhanced Training Application 

On exit from the product_scrn screen, control returns to the product_proc 
process.  The process calls a decision table to determine which function
is executed to update the product and option files data.

You will probably want to refer back to this diagram as you define the
various logic blocks for this application.

MPE/iX 5.0 Documentation