How to create new driver?

[Offler]

Since WinXP hardware developers splitted their drivers in two different ways.

First group is so called Win9x group. These drivers are intended for Windows 95,98,98SE and Millenium Edition. Basically all these drivers are VXD based or in some cases WDM based.

Second group is Windows XP/2k. These are compatible only with these systems and they are mostly WDM based.

Since Windows 98SE to Windows XP all systems are able to use WDM standard driver. That brings us to an idea how to create new driver if there is no Win9x driver available, but 2k/XP are.

Mostly is there only one difference - in construction of *.INF file which contains information how to install driver onto system.

Since i was unable to recreate a new driver using XP/2k driver and modified inf file i want to ask for some hints about limitations and about construction of *.inf files.