Compare against source manager?

I'm interested in writing a plugin that allows BC to compare a local file against a file in a source management library (Like Visual Source Safe, CVS, or our own internal one). Is something like this possible from the plugin API? If so, is there sample code?


It seems that there is an interface for this, but it's not documented and labeled "unsupported".

[Chris]

This isn't possible using the current plug-in interface. Right now the plug-in interface only supports additional viewers.

This is something that we're looking into for a future release.

This is something I also would very much like to see...!
Comparing local dirs against CVS or SVN would be great !