Interix

Set your 'Home' path in Computer Management, Users->Administrator->Profile 'Home Path' and set the directory of the SFU or SUA home directory create a home and username directory.

In the SUA documentation it does say MSDEV or VC98 in it use Visual Studio 4.0 or 6.0 with SUA or SFU.

Set C89_COMPILER to /dev/fs/C/MSDEV/BIN/CL.EXE

Set C89_LINKER to /dev/fs/C/MSDEV/BIN/LINK.EXE

Set the above environment variables in the Windows Control Panel

To start building Longhorn set OS_BUILDNUMBER to 3663

Build Comctrl32 v6 to start out with