OneNote Powertoy that imports TXT files w/ Source Code

One request I saw on our newsgroup was a customer who had thousands of TXT files which he wanted to import into OneNote. He had apparently used Notepad for years to store data on his hard drive. Fair enough. But now he wanted to migrate to OneNote and was stuck. The only solution he had was to open them one at a time and copy and paste into OneNote. Clearly not ideal. Another person wanted to see some sample code to simply add some text to a page in OneNote.