How to make sure there are no duplicate added to a string

After calling this function I would like to know how to make sure duplicate entries don't go in.

Function getEmailString(ByVal Rng As Range) As String
Dim Cell As Range
Dim Str As String
For Each Cell In Rng
    If Cell <> "" Then
        If Str = "" Then
            Str = Cell.Value
        Else
            Str = Str & ";" & Cell.Value
        End If
    End If
Next Cell
getEmailString = Str
End Function
LVL 2
SiHodgy007Asked:
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NorieAnalyst Assistant Commented:
Try this.
Function getEmailString(ByVal Rng As Range) As String
Dim Cell As Range
Dim Str As String

    For Each Cell In Rng
        If Cell <> "" Then
            If Str = "" Then
                Str = Cell.Value
            Else
                If InStr(Str, Cell.Value) = 0 Then
                    Str = Str & ";" & Cell.Value
                End If
            End If
        End If
    Next Cell
    
    getEmailString = Str
    
End Function

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Subodh Tiwari (Neeraj)Excel & VBA ExpertCommented:
I provided the same function in your last question. :)
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SiHodgy007Author Commented:
I know I opened this as instructed before you answered and couldn't close it
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Subodh Tiwari (Neeraj)Excel & VBA ExpertCommented:
No problem then. I thought the function didn't work for you so you posted the same question again. :)
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