Sub tst()
Dim rng As String
Range("b3").Select
Nex:
Do Until ActiveCell.Row = 2501
col = Mid(ActiveCell.Address, 2, 1)
rng = ActiveCell.Value
ActiveCell.Value = UCase(rng)
ActiveCell.Offset(1, 0).Activate
Loop
ActiveCell.Offset(-2498, 1).Activate
If col = "N" Then End
GoTo Nex