Anybody use fgui? I find it very handy.

I have a question about an argument to the call to gui in the first 
example. The argument is argFilter, my question has to do with specifying 
multiple filters. The argument in that example is

            argFilter=list(flname="{{Text files} {.txt}}") )  ## note 
space inbetween the braces!

The problem that I need to solve is that for certain types of files, I may 
want to have the user choose between a couple of different suffixes or be 
able to look at all files.

Including multiple extensions is easy-- comma separated extensions work. 
But I can't figure out any way to have the user be able to search first 
for text files, and if the suffix is not .txt, switch to {Any Files} 
{*.*}. I am not familiar with tcl, which I assume uses this knid of 
construct.

Any help would be appreciated.
Dave
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