---
title: "How to: Change the FlowDirection of Content Programmatically"
ms.date: "03/30/2017"
ms.custom: devdivchpfy22
description: Learn how to change the FlowDirection of content programmatically.
dev_langs: 
  - "csharp"
  - "vb"
helpviewer_keywords: 
  - "FlowDirection property [WPF], changing programmatically"
  - "documents [WPF], changing FlowDirection property programmatically"
ms.assetid: 02f5a8ba-f8c0-4e5a-84b9-4c5bf12922a2
---
# How to: Change the FlowDirection of Content Programmatically
This example shows how to programmatically change the <xref:System.Windows.FrameworkElement.FlowDirection%2A> property of a <xref:System.Windows.Controls.FlowDocumentReader>.  
  
## Create button elements
 Two <xref:System.Windows.Controls.Button> elements are created, each representing one of the possible values of <xref:System.Windows.FlowDirection>. When a button is clicked, the associated property value is applied to the contents of a <xref:System.Windows.Controls.FlowDocumentReader> named `tf1`.  The property value is also written to a <xref:System.Windows.Controls.TextBlock> named `txt1`.  
  
 [!code-xaml[FlowDirectionSnippets#_FlowDirectionXAML](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDirectionSnippets/CSharp/Window1.xaml#_flowdirectionxaml)]  
  
## C# code example
 The events associated with the button clicks defined above are handled in a C# code-behind file.  
  
 [!code-csharp[FlowDirectionSnippets#_FlowDirection](~/samples/snippets/csharp/VS_Snippets_Wpf/FlowDirectionSnippets/CSharp/Window1.xaml.cs#_flowdirection)]
 [!code-vb[FlowDirectionSnippets#_FlowDirection](~/samples/snippets/visualbasic/VS_Snippets_Wpf/FlowDirectionSnippets/VisualBasic/Window1.xaml.vb#_flowdirection)]