System Requirements:
Visual Studio 2002 to build for AutoCAD 2004-2006
Visual Studio 2005 to build for AutoCAD 2007-2008
Owen Wengerds VC Build Hook utility
Arx SDK for Acad2004
Arx SDK for Acad2007
Setting up System variables to point to the location of the SDK
In Windows XP go to the control panel->System->advanced tab-> Environment Variables and add your paths as shown:
See pic 1
In the same window add the paths for visual studio as explained on Owens webpage.
See pic 2
The solution on sourceforge is already all setup with the environment variables needed to compile.
On my computer I just needed to set "Use Unicode response files" = no in the zlib project.
And error reporting to default. This is also explained on Owen's page
http://www.manusoft.com/Resources/ARXTips/Index.stm#VC8ForARX2000