display dialog box before confirm closing of form..

in some sitation we want to display dialog box to user before closing form. Either by clicking on some button or close by pressing Alt +F4 This can be done by writing code in formClosing event.

Private Sub frmMyForm_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing

        If MessageBox.Show("Change has been made to this form. Do you want to continue?", "Are you sure?", MessageBoxButtons.YesNo) = System.Windows.Forms.DialogResult.Yes Then

            e.Cancel = True

        End If

    End Sub

At, that time we just need to cancle closing event. Nothing else otherwise form will be closed whatever you have write.