Hyperlink.ScreenTip (PowerPoint)
Returns or sets the ScreenTip text of a hyperlink.
ScreenTip text appears, for example, when you save a presentation to HTML, view it in a web browser, and rest the mouse pointer over a hyperlink. Some browsers may not support ScreenTips.
ActivePresentation.Slides(1).Hyperlinks(1).ScreenTip = "Go to the Code VBA home page"