Here are links to the source code from the series of videos on the API Code Pack from MSDEV:
Here is CS code for:
Extended Linguistic Services
Folder Picker
Known Folders
Libraries
Networks
Search
Task Dialogs
Drag & Drop
Restart & Recovery
And here is VB code for:
Extended Linguistic Services
Folder Picker
Known Folders
Libraries
Networks
Search
Task Dialogs
Drag & Drop
Restart & Recovery