Mouse scroll WITHIN a data validation list & option macro assistance

There have been many posts about trying to scroll through validation, ComboBoxes,ListBoxes, the usual end result when somebody tries this is that XL ends up freezing.
To add additional Text to a cell, you could try.

Range("C7") = Range("C7") & ", How are you?"

or

Range("C7") = Range("C7") & " " & TextBox1

Or if you wanted another line added to the cell

Range("C7") = Range("C7") & Chr(10) & " " & TextBox1