Need macro to calculate number of days elapsed between data in two columns

modify the code to look for "CreateDate" and use that to build the formula.

Sub Macro5()
    Rows("1:1").Select
    Selection.Find(What:="createdate", After:=ActiveCell, LookIn:=xlFormulas _
        , LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
        MatchCase:=False, SearchFormat:=False).Activate
    CCol = Split(ActiveCell.Address, "$")(1)
With Cells
    .FormatConditions.Add Type:=xlExpression, Formula1:= _
      "=$X1-$" & CCol & "1>=60"
    With .FormatConditions(.FormatConditions.Count)
        .SetFirstPriority
        With .Interior
            .PatternColorIndex = xlAutomatic
            .Color = 255
            .TintAndShade = 0
        End With
        StopIfTrue = False
    End With
End With
End Sub