Question : Microsoft Access 2007 - ControlTip Text on Form Control

I want a "tool tip" to appear whenever the user "mouses over" an object (such as a button) on the form but cannot seem to get the ControlTipText to work; the text does not appear.  

note: I realize that "mouse over" is not a term used in Access.

What is the correct method for making a tool tip to appear?

Answer : Microsoft Access 2007 - ControlTip Text on Form Control

That doesn't necessarily matter. Controls can be infront without being literally "in front".

Have you tried bringing that control to the front?
Right Click > Position > Bring To Front
(Also available on the Arrange Tab).