Hi Pieter,
Many apologies, the application was using a descendant of TAdvTreeview that I wrote a while ago, which looks to not work with the THTMLHint.
Setting the Hint property as above works for me now. However, do you know if it's possible to display a different hint, depending on the node and column you hover over. I've put some code in 'OnMouseMove' to change the Hint property, but the hint is only shown once, unless my mouse moves out of the treeview and back in. Is there a way of 'resetting' the hint, so it'll show the new hint when the mouse moves over a different cell?
Thanks for the continued support.