how-to-position-a-custom-context-menu-in-a-richtextbox.md

title	ms.date	ms.custom	description	dev_langs	helpviewer_keywords	ms.assetid
How to: Position a Custom Context Menu in a RichTextBox	03/30/2017	devdivchpfy22	Learn how to position a Custom Context Menu in a RichTextBox.	csharp vb	custom context menus [WPF], positioning positioning custom context menus [WPF] RichTextBox control [WPF], positioning custom context menus context menus [WPF], positioning	bf77c930-a546-4573-9a56-9af345ba189a

How to: Position a Custom Context Menu in a RichTextBox

This example shows how to position a custom context menu for a xref:System.Windows.Controls.RichTextBox.

When you implement a custom context menu for a RichTextBox, you are responsible for handling the placement of the context menu. By default, a custom context menu is opened at the center of the RichTextBox.

Add a listener for the ContextMenuOpening event

To override the default placement behavior, add a listener for the xref:System.Windows.FrameworkContentElement.ContextMenuOpening event. The following example shows how to do this programmatically.

[!code-csharpRichTextBox_ContextMenu#_AddListener] [!code-vbRichTextBox_ContextMenu#_AddListener]

Implementation of ContextMenuOpening event listener

The following example shows an implementation the corresponding xref:System.Windows.FrameworkContentElement.ContextMenuOpening event listener.

[!code-csharpRichTextBox_ContextMenu#_ListenerBody] [!code-vbRichTextBox_ContextMenu#_ListenerBody]

See also

• RichTextBox Overview
• TextBox Overview