Right click sheet tab>view code>insert this>
Private Sub Worksheet_Change(ByVal target As Range)
Application.EnableEvents = False
If target.Address = "$E$4" And IsNumeric(target) Then _
Range("f4").Value = Range("f4") + target
Application.EnableEvents = True
End Sub
And, if you want e4 to change when you change e4
Option Explicit
Dim oldvalue As Double
Private Sub Worksheet_Change(ByVal target As Excel.Range)
If target.Address = "$E$4" Then
On Error GoTo fixit
Application.EnableEvents = False
If target.Value = 0 Then oldvalue = 0
target.Value = 1 * target.Value + oldvalue
oldvalue = target.Value
fixit:
Application.EnableEvents = True
End If
End Sub
--
Don Guillett
Microsoft MVP Excel
SalesAid Software
(e-mail address removed)