在弹出菜单的禁用菜单项上显示工具提示提示

So I have a TMenuItem attached to a TAction on a TPopupMenu for a TDBGrid (actually 3rd party, but you get the idea). Based on the selected row in the grid, the TAction is enabled or disabled. What I want is to be able to display a hint to the user explaining why the item is disabled. So I have a TMenuItem attached to a TAction on