kb-common-change-windows-handedness-settings.md

title	page_title	description	type	slug	position	tags	ticketid	res_type
Change Windows Handedness Settings in Code Behind	How to change Windows Tablet PC Handedness Settings	Change where the Popup menus appear on the screen by setting SystemParameters.MenuDropAlignment.	how-to	kb-common-change-windows-handedness-settings	0	windows,tablet,settings,left-handed,right-handed,handedness,pc	1429407	kb

Environment

Product Version	2019.2.618
Product	Progress® Telerik® UI for WPF

Description

How to change windows handedness settings in code behind.

Solution

To change the Windows Handedness settings in code, you can set the SystemParameters.MenuDropAlignment property. The method need to be called after the InitializeComponent() method.

[C#]

{{region kb-common-change-windows-handedness-settings-0}} public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); SetAlignment(); } }

public static void SetAlignment()
{
	var ifLeft = SystemParameters.MenuDropAlignment;	  
	if (ifLeft)
	{
		var t = typeof(SystemParameters);
		var field = t.GetField("_menuDropAlignment", BindingFlags.NonPublic | BindingFlags.Static);
		field.SetValue(null, false);
	}
}

{{endregion}}