From time to time I get asked how to use the Cairo bindings for VisualWorks (and sometimes Pango too). Historically, the answer has been to either install the GTK runtime, or figure out how to get the individual library files yourself.
When I was at the Cairo summit, and with some helpful hints from others using Cairo, I put together the minimal set of DLLs you need to use Cairo (and the minimal set needed for Pango). Today I went and harvested them from the very latest GTK build. Just download the zip file, and unzip it in your working directory to get the behavior (you can of course put it in your system folders as well, or somewhere else and mess with your path).
Cairo:
wincairo.zip
Pango:
winpango.zip
Happy scribbling!