I need to concatenate a string in a column of a sheet based on user selection.

Column L contains a string to which I need to add either "(SC)" or "(DR#)"
where # is a number between 1 and 7. Ideally, the users can select the rows
they wish to modify (be it 1 row or 1000), right-click the mouse and choose
the appropriate modifier.

In my code, Selekt is a public variable to hold the choice from the
right-click. Note that there are two attempts to make this work with
different coding. The first is from another forum and I think it is closer to
doing what I need. The second is what I tried at the beginning.

Here's the code I have so far:

Private Sub InsertDR()

Dim t As Long
Dim rainj as range
Dim ro as range
Dim rev As String

If Selekt = "0" Then
For i = 1 To Selection.Rows.Count
rev = CStr(Sheet1.Cells(ro, 12).Value)
rev = rev & "(SC)"
Sheet1.Cells(ro, 12).Value = rev
Next
ElseIf CInt(Selekt) < 8 Then
rainj = ActiveSheet.Selection
For Each ro In rainj
rev = CStr(Sheet1.Cells(ro, 12).Value)
rev = rev & "(DR" & Selekt & ")"
Sheet1.Cells(ro, 12).Value = rev
Next
End If
End Sub

Any help here would be hot. Thanks!
--
Adios,
Clay Harryman