[Rd] suppressing 'download.file' progress window

[Roger D. Peng]

In Windows, 'download.file' pops up a separate window indicating the progress of 
the download (even when 'quiet = TRUE').  This is useful and informative when 
downloading a single (large) file.  However, when downloading multiple (smaller) 
files in sucession, the constant flashing of the progress window can be a little 
disorienting (at least for me).

Is there a way to suppress this progress window?  Or is it an operating system 
feature?

-roger
-- 
Roger D. Peng  |  http://www.biostat.jhsph.edu/~rpeng/