How to display multi forms in one form that has menus

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VB

MS-Access

I was developing a project using vbnet and access but I fail to know how I can link multiple form and how I can make them work embedded in one form that has menus to make changes.

Please help know how I can embed those forms to display in one.

' this is form that will display the every form to be updated 

Public Class LibrarySystemForm


    Private Sub welcome_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       
    End Sub


    Private Sub BookFormToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BookFormToolStripMenuItem.Click
        bookForm.Show()
    End Sub

    Private Sub AmountFormToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AmountFormToolStripMenuItem.Click
        amountForm.Show()

    End Sub

    Private Sub SupplierFormToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SupplierFormToolStripMenuItem.Click
        supplierForm.Show()
    End Sub

    Private Sub ReservationFormToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ReservationFormToolStripMenuItem.Click
        reservationForm.Show()
    End Sub

    Private Sub ReturnFormToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ReturnFormToolStripMenuItem.Click
        returnForm.Show()
    End Sub

    Private Sub UserdetailFormToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles UserdetailFormToolStripMenuItem.Click
        user_detailForm.Show()
    End Sub


    Private Sub MenuStrip1_ItemClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs) Handles MenuStrip1.ItemClicked

    End Sub

    Private Sub ToolStrip1_ItemClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs) Handles ToolStrip1.ItemClicked

    End Sub

    Private Sub ToolStripContainer1_ContentPanel_Load_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripContainer1.ContentPanel.Load, ContentPanel.Load
        bookForm.Show()
    End Sub



End Class

' this the code of one of the form that has to be embed in the form that has menus to be edited
Public Class supplierForm

    Private Sub SuppliersBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Me.Validate()
        Me.SuppliersBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me._CUULibDB_mdbDataSet3)

    End Sub


    Private Sub SuppliersBindingNavigatorSaveItem_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SuppliersBindingNavigatorSaveItem.Click
        Me.Validate()
        Me.SuppliersBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me._CUULibDB_mdbDataSet3)

    End Sub

    Private Sub Form7_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the '_CUULibDB_mdbDataSet3.suppliers' table. You can move, or remove it, as needed.
        Me.SuppliersTableAdapter.Fill(Me._CUULibDB_mdbDataSet3.suppliers)

    End Sub
End Class

I would like to get someone's email so that I may send to him or her the whole project to have look on it. thank u