I have what I hope is an easy (and perhaps dumb question). I've noticed
that the images on the built-in Office 2007 ribbons (Excel, Word, etc)
change size as the application window shrinks and expands. That is the
images get smaller and simpler as the window gets smaller to avoid the need
to horizonally scroll the ribbon.

I have a custom ribbon tab for my Excel 2007 application and I would like to
implement the same functionality but am unclear how to accomplish this.

Any insights?

TIA,

josh