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UserControl Constructor
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UserControl Constructor

Initializes a new instance of the UserControl class.

[Visual Basic]
Public Sub New()
[C#]
public UserControl();
[C++]
public: UserControl();
[JScript]
public function UserControl();

Remarks

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

Example

[Visual Basic, C#, C++] The following 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.

[Visual Basic] 
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports System.ComponentModel
Imports Microsoft.VisualBasic
Imports UserControls

Namespace MyApplication    
    
    Public Class MyUserControlHost
        Inherits System.Windows.Forms.Form

        ' Create the controls.
        Private components As System.ComponentModel.IContainer
        Private panel1 As System.Windows.Forms.Panel
        Private myUserControl As UserControls.MyCustomerInfoUserControl
                
        ' Define the constructor.
        Public Sub New()
            Me.InitializeComponent()
        End Sub        
        
        <System.STAThreadAttribute()> _
        Public Shared Sub Main()
            System.Windows.Forms.Application.Run(New MyUserControlHost())
        End Sub        
        
        ' Add a Panel control to a Form and host the UserControl in the Panel.
        Private Sub 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.
            panel1.Controls.Add(myUserControl)
            Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
            ' Size the Form to accommodate the Panel.
            Me.ClientSize = New System.Drawing.Size(panel1.Size.Width + 10, panel1.Size.Height + 10)
            Me.Text = "Please enter the information below..."
            ' Add the Panel to the Form.
            Me.Controls.Add(panel1)
        End Sub
    End Class
End Namespace

[C#] 
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() 
      {
         this.InitializeComponent();
      }
        
      [System.STAThreadAttribute()]
      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.
         panel1.Controls.Add(myUserControl);
         this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
         // 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.
         this.Controls.Add(panel1);
      }   
   } // End Class
} // End Namespace

[C++] 
public __gc class MyUserControlHost : public System::Windows::Forms::Form 
{
   // Create the controls.
private:
   System::ComponentModel::IContainer* components;
   System::Windows::Forms::Panel* panel1;
   UserControls::MyCustomerInfoUserControl* myUserControl;

   // Define the constructor.
public:
   MyUserControlHost() 
   {
      this->InitializeComponent();
   }

   // 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 = System::Drawing::Point(5, 5);
      // Add the user control to the Panel.
      panel1->Controls->Add(myUserControl);
      this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
      // Size the Form to accommodate the Panel.
      this->ClientSize = System::Drawing::Size(
         panel1->Size.Width + 10, panel1->Size.Height + 10);
      this->Text = S"Please enter the information below...";
      // Add the Panel to the Form.
      this->Controls->Add(panel1);
   }   
}; // End Class

[System::STAThreadAttribute]
int main() 
{
   System::Windows::Forms::Application::Run(new MyUserControlHost());
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

UserControl Class | UserControl Members | System.Windows.Forms Namespace

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