title | description | ms.date | dev_langs | helpviewer_keywords | ms.assetid | |||||
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Add Controls |
Learn how to draw a control on a Windows Form. A control is a component on a form you can use to display information or accept user input. |
03/30/2017 |
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2af86001-9d62-4154-87fb-66db2c3cd9fd |
Most forms are designed by adding controls to the surface of the form to define a user interface (UI). A control is a component on a form used to display information or accept user input. For more information about controls, see Windows Forms Controls.
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Open the form. For more information, see How to: Display Windows Forms in the Designer.
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In the Toolbox, click the control you want to add to your form.
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On the form, click where you want the upper-left corner of the control to be located, and drag to where you want the lower-right corner of the control to be located.
The control is added to the form with the specified location and size.
[!NOTE] Each control has a default size defined. You can add a control to your form in the control's default size by dragging it from the Toolbox to the form.
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Open the form. For more information, see How to: Display Windows Forms in the Designer.
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In the Toolbox, click the control you want and drag it to your form.
The control is added to the form at the specified location in its default size.
[!NOTE] You can double-click a control in the Toolbox to add it to the upper-left corner of the form in its default size.
You can also add controls dynamically to a form at run time. In the following code example, a xref:System.Windows.Forms.TextBox control will be added to the form when a xref:System.Windows.Forms.Button control is clicked.
[!NOTE] The following procedure requires the existence of a form with a Button control,
Button1
, already placed on it.
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In the method that handles the button's
Click
event within your form's class, insert code similar to the following to add a reference to your control variable, set the control'sLocation
, and add the control.Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim MyText As New TextBox() MyText.Location = New Point(25, 25) Me.Controls.Add(MyText) End Sub
private void button1_Click(object sender, System.EventArgs e) { TextBox myText = new TextBox(); myText.Location = new Point(25,25); this.Controls.Add (myText); }
private: System::Void button1_Click(System::Object ^ sender, System::EventArgs ^ e) { TextBox ^ myText = gcnew TextBox(); myText->Location = Point(25,25); this->Controls->Add(myText); }
[!NOTE] You can also add code to initialize other properties of the control. [!IMPORTANT] You might expose your local computer to a security risk through the network by referencing a malicious
UserControl
. This would only be a concern in the case of a malicious person creating a damaging custom control, followed by you mistakenly adding it to your project.