More .NET CF P/Invoke...

After giving up on this for the day, I discovered links to these 2 MSDN articles on N/Direct:

An Introduction to P/Invoke and Marshaling on the Microsoft .NET Compact Framework
by Jon Box, Dan Fox

Advanced P/Invoke on the Microsoft .NET Compact Framework
by Jon Box, Dan Fox

They look promising, so I'll let you know if I finally understand it after reading, digesting, and implementing.

[edited]

Here is one more that may be useful:

Writing Unmanaged Functions for Microsoft .NET Compact Framework-based Applications
by Content Master Ltd