How do I add info to "Change Tracking" comment box (blue triangle)

[MikeZz]

I had to write my own change tracking code for my application and wanted to
know how to write a comment to Excel's Change Tracking comments.

Those are the ones with the blue triangle in the upper left of a cell.

I found all kinds of reference how to VBA the standard comments but nothing
on how to do the tracking comments.

For that matter, are there also other types of comments available... maybe
the bottom left or right corner triangles?

Thanks,
MikeZz