'Declaration Protected Friend Overridable Sub OnShowInsertionPoint()
protected internal virtual void OnShowInsertionPoint()
Note: The element that represents the insertion point is defined by the GroupByAreaBase as a TemplatePart with the name 'PART_InsertionPoint'. If you replace the Template of the GroupByAreaBase, you will probably want to include an element with that name. The GroupByAreaBase will automatically move the insertion point as needed when the user drags GroupByAreaFieldLabels. It will also fire this event when the insertion point should be shown. You should include an EventTrigger in your replacement Template that listens for this event and shows the insertion point element.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2