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FindForm Method
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Control.FindForm Method

Retrieves the form that the control is on.

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

[UIPermissionAttribute(SecurityAction.Demand, Window = UIPermissionWindow.AllWindows)]
public Form FindForm()

Return Value

Type: System.Windows.Forms.Form
The Form that the control is on.

The control's Parent property value might not be the same as the Form returned by FindForm method. For example, if a RadioButton control is contained within a GroupBox control, and the GroupBox is on a Form, the RadioButton control's Parent is the GroupBox and the GroupBox control's Parent is the Form.

The following code example finds the form that contains the specified button.

// This example uses the Parent property and the Find method of Control to set 
// properties on the parent control of a Button and its Form. The example assumes 
// that a Button control named button1 is located within a GroupBox control. The  
// example also assumes that the Click event of the Button control is connected to 
// the event handler method defined in the example. 
private void button1_Click(object sender, System.EventArgs e)
{
   // Get the control the Button control is located in. In this case a GroupBox.
   Control control = button1.Parent;
   // Set the text and backcolor of the parent control.
   control.Text = "My Groupbox";
   control.BackColor = Color.Blue;
   // Get the form that the Button control is contained within.
   Form myForm = button1.FindForm();
   // Set the text and color of the form containing the Button.
   myForm.Text = "The Form of My Control";
   myForm.BackColor = Color.Red;
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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