[R-gui] A GUI question

Hi,

I want to design an user interface, of course, base on GUI tools.
Ideally, it's a frame which contains top menu bar in the top-left area;
output window in the top-right area; and text message (task running
message, error message, or whatever other message) at the whole bottom
area.

This all sounds possible in Tcl/Tk.  ActiveTcl is not required 
for anything.  It is just a convenient way to install Tcl/Tk and 
the demos, particularly on Windows (but read the license 
agreement carefully if you want to redistribute it!).  I 
certainly don't think you will run into any fundamental Tcl/Tk 
problems in trying to integrate different widgets within one 
frame.  But you might want to read Luke Tierney's 
"Threading and GUI Issues":
http://www.stat.uiowa.edu/~luke/R/thrgui/thrgui.pdf
especially if you are hoping to have different parts of 
your frame updating simultaneously.

Hope this helps,
James