"Shared drive" means one workbook is shared?
You cannot see or edit code in a shared workbook so must unshare before adding the code.
You can re-share it later after you have done your testing and are satisfied with results.
Good idea to make an unshared copy of the workbook for practice workbook.
The code below between the ******************** must be copied then pasted into the Thisworkbook module so's it will affect whichever sheet is currently active.
ALT + F11 to open VBE.
CTRL + r to open Project Explorer.
Select and expand your workbook/project.
Click on Microsoft Excel Objects.
Double-click on Thisworkbook to open.
Paste the code in there then save.
Alt + q to return to the workbook.
*******************************
Private Sub Workbook_SheetChange(ByVal Sh As Object, ByVal Target As Range)
Dim someCells As Range
With ActiveSheet
Application.ScreenUpdating = False
If ActiveCell.Column <> 3 Then Exit Sub
Set someCells = ActiveSheet.Range("C4", _
Cells(.Cells.Count))
With someCells
.Sort Key1:=Range("C4"), Order1:=xlAscending, Header:=xlYes, _
OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom, _
DataOption1:=xlSortNormal
End With
End With
ActiveSheet.Cells(Rows.Count, 4).End(xlUp) _
.Offset(1, 0).Select
Application.ScreenUpdating = True
End Sub
***************************
Good luck