The DRIVER.SRC directory is intended for advanced programmers only.

These directories contain the source code for the two components of the
Windows 95 and NT Generic IRQ drivers.

The DLL directory contains the source code for the wrapper dll, which,
while totally optional, makes use of the VxD and SYS much simpler.

The VxD directory contains the code for the VxD itself.  This file is built
using the latest version of the Microsoft MSDN DDK and Visual C.

The SYS directory contains the code for the SYS itself.  This file is built
using the latest version of the Microsoft MSDN DDK and Visual C.