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Control.Resize Event

Occurs when the control is resized.

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

'Declaration
Public Event Resize As EventHandler

To determine the Size of the resized control, you can cast the sender parameter of the registered EventHandler method to a Control and get its Size property (or Height and Width properties individually).

To handle custom layouts, use the Layout event instead of the Resize event. The Layout event is raised in response to a Resize event, but also in response to other changes that affect the layout of the control.

For more information about handling events, see Handling and Raising Events.

The following code example handles the Resize event of a Form. When the form is resized, the event handler ensures that the form stays square (its Height and Width remain equal). To run this example, make sure and associate this event-handling method with the form’s Resize event.

Private Sub Form1_Resize(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Resize

   Dim myControl As Control
   myControl = sender

   ' Ensure the Form remains square (Height = Width). 
   If myControl.Size.Height <> myControl.Size.Width Then
      myControl.Size = New Size(myControl.Size.Width, myControl.Size.Width)
   End If 
End Sub

.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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