appevents OnHint event
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Applies to
acAppEvents component.  

property OnHint: TNotifyEvent;  

The OnHint event occurs when the mouse pointer moves over a control or menu item that can display a Help Hint.  
Write an OnHint event handler to perform special processing when the mouse pauses over a control or menu item whose Hint property is not an empty string ('').  
A common use of the OnHint event is to display the value of a control or menu item's Hint property as the text of a status bar (TStatusBar). The Hint property of a control can specify both a short Help Hint and a (usually) longer hint that appears elsewhere because of code in an OnHint event handler.  

See also
OnShowHint and OnHelp events.