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docs-desktop/dotnet-desktop-guide/framework/wpf/app-development/how-to-set-the-width-of-a-window-from-a-page.md
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---
title: "How to: Set the Width of a Window from a Page"
ms.date: "03/30/2017"
helpviewer_keywords:
- "width of windows [WPF], setting from a page"
- "windows [WPF], setting width from a page"
- "pages [WPF], setting window width from"
ms.assetid: 31601c92-7889-472a-b07e-bf675ad21c92
---
# How to: Set the Width of a Window from a Page
This example illustrates how to set the width of the window from a <xref:System.Windows.Controls.Page>.
## Example
A <xref:System.Windows.Controls.Page> can set the width of its host window by setting <xref:System.Windows.Controls.Page.WindowWidth%2A>. This property allows the <xref:System.Windows.Controls.Page> to not have explicit knowledge of the type of window that hosts it.
> [!NOTE]
> To set the width of a window using <xref:System.Windows.Controls.Page.WindowWidth%2A>, a <xref:System.Windows.Controls.Page> must be the child of a window.
[!code-xaml[HOWTONavigationSnippets#SetPageWindowWidthXAML](~/samples/snippets/csharp/VS_Snippets_Wpf/HOWTONavigationSnippets/CSharp/SetWindowWidthPage.xaml#setpagewindowwidthxaml)]