May be quicker??

Sub counterif()
Set ms = Selection
For i = 2 To ms.Rows.Count
Cells(i, Selection.Column) = "MUSA_" & _
Format(i, Application.Rept("0", Len(ms.Rows.Count)))
Next i
End Sub

--
Don Guillett
Microsoft MVP Excel
SalesAid Software

"musa.biralo" wrote in message
...
Hi there,

The code below takes a bit time to populate the ID if I select bigger
range....Is there any way to expedite it.
Any help will be appreciated!!!!

Dim DataCell As Range
Dim TotalData As Integer
Dim Counter

Response2Msg = MsgBox("Did you select the range of cells to insert the
IDM ID?", vbYesNo, "Select required range?")
If Response2Msg = vbNo Then End
i = 1
For Each DataCell In Selection
TotalData = Selection.Rows.Count
If TotalData < 10 Then
Counter = Format(i, "0")
ElseIf TotalData = 10 And TotalData < 100 Then
Counter = Format(i, "00")
ElseIf TotalData = 100 And TotalData < 1000 Then
Counter = Format(i, "000")
ElseIf TotalData = 1000 And TotalData < 10000 Then
Counter = Format(i, "0000")
ElseIf TotalData = 10000 And TotalData < 100000 Then
Counter = Format(i, "00000")
End If

DataCell.Value = "MUSA_" & Counter
i = i + 1

Next DataCell