[Hero]

I thinks the best answer is that there is nothing similar between these two versions!
Because in VS 2003 .NET,the VS is became behind an layer named .NET framework
and every program is written for this layer language(Don't look it the apperance
of language that compiled code in deferent.)
This is theoricaly for making VS 2003 .NET portable between deferent OSs.
VS 2003 .NET is compiling to MSIL(Microsoft Intermediate Language) but the earlier
versions will be compiled for system OS direcly(asmbelly language).
If somebody want to work with OS basic structures,Normaly should use VS 6 because
It is more powerfull than VS 2003 .NET for working with system.

sincerely yours