como establecer un Form Hijo

    Private Sub RegistroDeInventarioToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RegistroDeInventarioToolStripMenuItem.Click
        Dim RegistroAlmacen As New RegistroAlmacen
        RegistroAlmacen.MdiParent = Me
        RegistroAlmacen.WindowState = FormWindowState.Maximized
        RegistroAlmacen.Show()
    End Sub