Here is some code you can use. You can add the code for the 3rd TextBox and menu item. BTW, my menu items are sub-menus so that they can show check marks that indicate when the associated textbox is enabaled.
Code:
Private Sub mnuTB1_Click()

    ' Change the Enabled property each time the menu
    ' item is clicked
    Text1.Enabled = Not Text1.Enabled
    ' Set the Checked property of the menu item to
    ' Checked in Text1 is enabled, otherwise set it
    ' to not checked.
    mnuTB1.Checked = Text1.Enabled
    
End Sub


Private Sub mnuTB2_Click()

    Text2.Enabled = Not Text2.Enabled
    mnuTB2.Checked = Text2.Enabled

End Sub

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Marty
What did the fish say when it hit the concrete wall?
> > > > > "Dam!"