.LP
The `Variables' subform is used to define variables and evaluate 
expressions within the \fBcantata\fP visual language programming environment.
An "interactive entry window" accepts user input in the form of 
arithmetic or logical expressions using the
standard C language operator syntax and
certain predefined constants and functions (see documentation on
specific features).  "Action buttons" provide feedback to the user 
via pop-up windows.
.SH 
ACTION BUTTONS
.IP "LIST" 10
Used to list the current value of all user defined variables and functions.  
To update the list, you must QUIT the pop-up and then click 
on `LIST' to get a new listing.
.IP "HISTORY" 10
Used to display a history listing of all previously entered valid
expressions and functions.  
To update the list, you must QUIT the pop-up and then click 
on `HISTORY' to get a new listing.
.IP "HELP" 10
Provides documentation concerning the use of the VARIABLES subform.
.IP "CLOSE" 10
The CLOSE button removes the `Variables' subform from the 
display screen. All variables remain active.
