Rowtracking/highlighting on Apex controls

[smkassal]

The Apex combo control allows you to set rowtracking to true which will highlight the rows on a dropdown when your cursor moves over them.

I am trying to implement this in the dropdowns within my Grid control and also within the TDBDropDropdown control and I can't find the setting. You are guessing on what you are selecting. There must be a setting for this - can anyone help?

Thanks!
Susan