Does any one know of an easy way to maintain seperate Visual Studio "include file profiles" and quickly switch between them? (Something like a user defined "Platform"?. I use VS to develop both Win32/MFC apps and MS-DOS 16 bit apps and they have completely different include/lib/prog directory locations. At the moment I have to run a batch file to modify the VS registry entries every time I switch from Win to DOS development? There has to be a better way! gjr