applies the print command to each expression in the expression_list if
int_expression is positive.
dbprint may also be used in procedures
in order to print results subject to certain
conditions.
Syntax:
dbprint ( expression )
Type:
none
Purpose:
The print command is applied to the expression
if printlevel>=voice.
Note:
See Libraries, for an example how this is used
for displaying comments while procedures are executed.