xfzheng asked:
[We're porting a Windows app to Linux, and would like to mix native Linux GUI code and Windows GUI code.]
You're probably not going to have much luck with that.
Better (and easier, I bet) to do a pure port.
Even easier to run the Windows version in Wine. Have you tried that yet? There are ways (see Google's Picasa) to hide drive letters from the user somewhat. - Dan