John,
There are two things you can do with Unsniff.
1) Automate it by scripting (Scripting Guide)
2) Write plugins to dissect your own protocols - the main strength is that it is quicker and safer using the Unsniff API than Wireshark. Also you get to keep your plugin private compared to the GPLv2 bound license. (Developer Guide)
The two guides are available at
www.unleashnetworks.com/devzone/unsniff/...ces.html#scriptguide
Scroll down to the bottom.
There is an API developers pack which integrates with Visual Studio 6 and Visual Studio 2005. This contains all the headers/libs and Wizards to write your own plugins. I removed it from the downloads page because it doesnt support VS2008 or VS2010 yet. You can get it from here
www.unleashnetworks.com/lib/setup_unsniff_API_R_1_0_1_1157.msi
I would like to help you get started with it. Can you tell me a bit about what your goal is ?
Thanks,