This is an add-in that adds toolbar buttons to perform the Comment and Un-Comment functions. It demonstrates how easy it is to customize Pelles C UI, and how flexible Pelle and et al. have made the system.
All source code is included in the zip as well as the final BComment.dll, which needs to be copied to Bin-Addins64 directory and enabled under Tools - Customize - Add-Ins as "PellesC Button Comments"
John Z