To build kernel-mode drivers, refer to the description of the BUILD utility in the Programmer’s Guide. You must provide a file named makefile and a file named sources, and place them in the directory path containing your source files. Refer to the makefile and sources files provided with the source code for the sample drivers in this DDK.
Libraries and header files are provided for the various device and driver types and are referred to in the chapters describing each driver type. The chapters are listed in Types of Multimedia Devices.
Kernel-mode multimedia drivers for Windows NT must have a file extension of .sys.