[TRMW]
use_viewer =0
Normally specified in named program section only (with QAB programs); processed when QAB programs are loaded or when a C application calls the trm_set_progname() function.
From 4.621, if use_viewer=1 then when a programs prints to the screen and is not using DFPRINT, then instead of immediately echoing all the print output to screen (as in previous versions), a temporary file is created. When the program closes the print output stream, the program specified in the viewer configuration setting is used to view the file.
Please note that the issued 4.621 dp4.ini has had this setting applied for most standard DP4 utilities that do any printing. You are recommended to make sure these new settings are applied to your own DP4 configuration file.