Need help with LineEdit Control flags

[tribby@hpindda.cup.hp.com (David Tribby)]

Here's a question that (probably) can only be answered by someone
who knows the internals of the Apple IIGS toolbox:

I'm writing a desktop program that displays text values that the 
program (not the user) updates in a window. The new SetLETextByID 
control manager call fits the bill, so I created line edit text
control resources for the window using rez. The program has to do 
a HiliteControl(0x00FF, ... ) for each of the line edit controls in 
the window so that users can't modify the text.

This works fine! However, I would like to avoid the calls to HiliteControl 
in my program, and am wondering why (according to Toolbox Reference Vol. 3, 
p.28-55) the Highlight field (bits 15-8 of the "flag" word) must be set to 
0. As an experiment, I compiled the resources with "flag" set to 0xFF00 
and didn't do the HiliteControl in the program. Everything seems to work 
the same.

My question: Is Vol. 3 in error when requiring the hilight field to
be 0 for line edit controls? 

Getting rid of those HiliteControls would greatly simplify my window
creation code, but I don't want to use a "feature" that Apple does
not support.

-- Dave Tribby

Dave Tribby            Internet: tribby@cup.hp.com   GEnie: D.TRIBBY
Hewlett-Packard Information Networks Division, Cupertino, California