Occurs when any tooltip on the element is opened.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
To manually open tooltips, handlers of the events should mark the relevant event as handled. Otherwise, the value of the ToolTip property will be used to automatically open a context menu. Marking the event handled will effectively cancel the default action, and could be an opportunity to reset the value of the ToolTip property and then open the new ContextMenu. Note that this event will not be raised if ToolTip is a null reference or otherwise unset.
This event cannot be an EventTrigger in a style. This is because the identifier field of this event re-uses an implementation from a service that does not expose add/remove methods on the event.
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.