MDI & Hijos.

[GeoAvila]

la única diferencia sería en el mdiform en vb.net 2005
el evento guardar lo puse en resize

Código:

Option Strict Off
Option Explicit On
Friend Class MDIForm1
    Inherits System.Windows.Forms.Form
    
    Private Sub MDIForm1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load
        Form1.Show()
        Form2.Show()
    End Sub

    Private Sub MDIForm1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Resize

        Dim  Forma As Object
        For Each Forma In My.Application.OpenForms

            If Forma.Visible = True Then

                If Forma.Name <> "MDIForm1" Then

                    Forma.guardar()
                End If
            End If
        Next Forma
    End Sub
End Class

nos vemos..