Add note to Dimension VBA (Beginner)

I am trying to learn VBA for microstation and finding it very difficult. There seems to be little to no documentation or tutorials online.

I have a userform that will allow the user to select a note to add to a dimension, ie TYP, CLR, etc.

I have the userform built and it displays all the notes via a listbox. The part I'm unsure how to do is add the selected note to a selected dimension.

Can someone provide an example of how to go about doing this?