Thanks for your comments so far smile
But really the sunshadows are still very weak, they are only good looking on some screenshots in some rare situations :P
The dll not loading seems to be caused by IE7, I am still figuering out how to solve it. I compiled the dll with the dx sdk from April 2006, so an outdated dx version shouldn´t be the problem.

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com