I checked it again. The problem is, that I’m using WIN 7 64bit, and when I run the sample in visual studio, it does not work(I had to copy the lib file into the solution directory, but I used the i386 lib, because the amd64 lib causes several linker errors). If I use the bin file for amd64 it works.
I will do my tests an winxp 32bit, so it’s no problem, thank you.