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reference variable instances

MBHEY131 asked
Last Modified: 2015-04-30
here's my code:
Public Class frmMain

    Private Sub btnShopRO_Click(sender As Object, e As EventArgs) Handles btnShopRO.Click

        Dim sform As New frmShopHandMain

    End Sub
End Class

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there is other code there but I condensed it to the pertinent data.
sform variable opens and app starts fine however I would like to know the best way to access  this variable instance of update some text boxes when I launch another form from the sform instance (I don't want to make in a GLOBAL VARIABLE or anything close to that)
I would like to know the best way to declare the FORM variable and keep it as narrow instance as possible.
 I am trying to understand the FRIEND, PROTECTED FREIND, etc. access levels but would like some input as this is my first incursion to this coding area.
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