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ContainerControl.ParentForm Property

Gets the form that the container control is assigned to.

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

'Declaration
<BrowsableAttribute(False)> _
Public ReadOnly Property ParentForm As Form

Property Value

Type: System.Windows.Forms.Form
The Form that the container control is assigned to. This property will return null if the control is hosted inside of Internet Explorer or in another hosting context where there is no parent form.

The following code example shows how to create two forms: Form1 and Form2. Set the IsMdiContainer property of Form1 to true and make it the MdiParent of Form2. Next, create a button, button1, on each form. When the button on the parent form is clicked, the event handler displays the child form. When the button on the child form is clicked, the event handler displays the Name property of its parent form. Use the following two code segments to overwrite button1 event handlers in both forms.

' The event handler on Form1. 
Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
    ' Create an instance of Form2. 
    Dim f2 As New Form2()
    ' Make this form the parent of f2.
    f2.MdiParent = Me 
    ' Display the form.
    f2.Show()
End Sub 'button1_Click
' The event handler on Form2. 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    ' Get the Name property of the parent. 
    Dim s As String = ParentForm.Name
    ' Display the name in a message box.
    MessageBox.Show("My parent is " + s + ".")
End Sub 'button1_Click

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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