I'm trying to build a new release of RMagick that is compatible with the 
Ruby 1.8.6 One-Click Installer. In the past I have used MS Visual Studio 
2005 Express Edition.

However, new releases of ImageMagick for Windows are built with Visual 
Studio 2008 and when I build RMagick with the 2005 Visual Studio the 
resulting library fails, apparently because of some incompatibility. (I 
confess I am very inexperienced with Windows development, so I'm not 
sure what the incompatibility would be.)

Does anybody know for sure if a binary extension built with Visual 
Studio 2008 will work with the current 1.8.6 OCI?

-- 
RMagick: http://rmagick.rubyforge.org/