If you find a command line compiler which compiles c++/cli, C::B can support it.
I think the cl.exe (the visual c++ compiler) supports c++/cli.
Read the VC++'s manual, there should be mentioned something about it.
I think the option is /clr.
I've never used it myself, so my knowledge ends here...
C::B supports vc 2003, 2005 and 2008 (not sure about 2010, maybe the latest nightlies has support for it), to find how to setup one of them go to the wiki.
If you target c++/cli I think you need 2008+ (2005 might support it, but you should check the manuals too be 100% sure).