I found this old C++ code lying around that I'd written back in 2001 to ping Weblogs.com when my weblog had updated.
I originally wrote it so I could experiment with XML-RPC based services using WinINet.
The code originally compiled into a DLL that could be used as a COM component or loaded and called with a traditional exported function.
You'll find a simple Visual Basic sample as well as a C++ command line app and a batch file I used to call it.
It's not worth anything, except possibly a history lesson.