I am a huge fan of Capturx for OneNote for all of my physical paper notebook needs but I wanted to pass on a project done by Johan de Koning where he got a little gadget called “Digital Notepad” which outputs TOP (WALTOP) files and converts them into OneNote notebooks. He outlined his whole project step-by-step; with how he programmed his addin and got it working. The whole story is interesting and you can read it here: Top2OneNote Addin – Making my digital notepad notes searchable.
Even more fun is that Johan put all of his code up on CodePlex: Top2OneNote AddIn. Nice work Johan!