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Visual Basic .NET/IDisposable
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The IDisposable Interface
Basics
The IDisposable interface is implemented when an object needs to be "cleaned up" after use. If an object has a "Dispose" method, then it needs to be cleaned up after use.
The easiest way to clean up this sort of object is by using the VB keyword "Using".
Using f As New Form
f.Show
End Using
When an IDisposable object is a form-level variable, it should be disposed in the Form_Closed event.
Public Class Form1
Private mfrmChild As Form
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
mfrmChild = New Form
mfrmChild.Text = "Child"
mfrmChild.Show()
End Sub
Private Sub frmMain_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed
mfrmChild.Dispose()
End Sub
End Class
fr:Visual Basic .NET/IDisposable