There will probably be some conversions needed to your code. VC6 came out before C++98 was standardized, and does a lot of things in ways that now go against the standard. One of the most major is how it scopes variables in for statements. You will probably encounter this problem when porting code from VC6 to VC8.

There are other issues regarding templates and such, but they aren't as common as the for loop issue. Shouldn't take too much work, and the way VC6 handles it is completely wrong anyways, so it would be a good idea to fix.

Thanks, Dranith. I just downloaded VC-2005 and the first project I tried porting from 6.0 was running within about 5 minutes. Also, I thought it was a choice of 6.0 or 2005, but both versions of VC are working.

I don't really have any problems with VC++ 6.0.