On Jan 19, 2014 8:19 PM, "Neil Toronto" <<a href="mailto:neil.toronto@gmail.com">neil.toronto@gmail.com</a>> wrote: > > On 01/19/2014 09:04 AM, WarGrey Gyoudmon Ju wrote: >> >> On Sun, Jan 19, 2014 at 6:52 AM, Matthias Felleisen >> <<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a> <mailto:<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a>>> wrote: >> >> >> On Jan 18, 2014, at 5:48 PM, WarGrey Gyoudmon Ju wrote: >> >>> Okay, I see. >>> >>> Two more questions. >>> 1. Can frame% instance be transparent so that I can see the 2nd >>> top-level window through it? >> >> >> Are you looking for a pane? >> >> >> Nope. >> >> The picture below shows my target. >> Inline image 1 >> The top-level window is my Racket GUI Application (Here iTerm2.app is >> used as an example), and the second top-level window is <a href="http://gmail.com">gmail.com</a> >> <<a href="http://gmail.com">http://gmail.com</a>>. I can see both because the top-level one is >> transparent. > > > Racket uses the wxWidgets toolkit for GUI stuff, and it doesn't support this. It can make a top-level window partially transparent, but not just the client area or just one subwindow (e.g. panel). This hasn't been the case since the release of version 5.1 a few years back. Sam