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UserControl Constructor

Initializes a new instance of the UserControl class.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public UserControl()

You do not typically create an instance of UserControl. To create your own user control class, inherit from the UserControl class.

The following code example creates an instance of the UserControl derived class, MyCustomerInfoUserControl, which was created in the example section of the UserControl class overview. The user control is added to a Panel control and has its Dock property set to DockStyle.Fill. The Panel is then added to a Form.

using System;
using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel;
using UserControls;

namespace MyApplication 

   public class MyUserControlHost : System.Windows.Forms.Form 
      // Create the controls.
      private System.ComponentModel.IContainer components;
      private System.Windows.Forms.Panel panel1;
      private UserControls.MyCustomerInfoUserControl myUserControl;

      // Define the constructor.
      public MyUserControlHost() 

      public static void Main() 
         System.Windows.Forms.Application.Run(new MyUserControlHost());

      // Add a Panel control to a Form and host the UserControl in the Panel.
      private void InitializeComponent() 
         components = new System.ComponentModel.Container();
         panel1 = new System.Windows.Forms.Panel();
         myUserControl = new UserControls.MyCustomerInfoUserControl();
         // Set the DockStyle of the UserControl to Fill.
         myUserControl.Dock = System.Windows.Forms.DockStyle.Fill;

         // Make the Panel the same size as the UserControl and give it a border.
         panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
         panel1.Size = myUserControl.Size;
         panel1.Location = new System.Drawing.Point(5, 5);
         // Add the user control to the Panel.
         // Size the Form to accommodate the Panel.
         this.ClientSize = new System.Drawing.Size(
            panel1.Size.Width + 10, panel1.Size.Height + 10);
         this.Text = "Please enter the information below...";
         // Add the Panel to the Form.
   } // End Class
} // End Namespace

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.