I am using this macro graciously provided by a group member. I am trying to
modify it so that it is case sensitive to the values in ColA.

Thank You in advance for your help.

Dim iRow As Long
Dim FirstRow As Long
Dim LastRow As Long
Dim wks As Worksheet

Set wks = Worksheets("Sheet1")

With wks
FirstRow = 2 'headers in row 1
LastRow = .Cells(.Rows.Count, "A").End(xlUp).Row

.Range("A1:C" & LastRow).Sort _
key1:=.Range("A1"), order1:=xlAscending, _
key2:=.Range("c1"), order2:=xlAscending, _
key3:=.Range("b1"), order3:=xlAscending, _
header:=xlYes

For iRow = LastRow To FirstRow + 1 Step -1
If .Cells(iRow, "A").Value = .Cells(iRow - 1, "A").Value _
And .Cells(iRow, "C").Value = .Cells(iRow - 1, "C").Value Then
.Cells(iRow - 1, "B").Value _
= .Cells(iRow - 1, "B").Value _
& ";" & .Cells(iRow, "B").Value
.Rows(iRow).Delete
End If
Next iRow
End With

End Sub