Excel vba add code to sheet module programmatically

How to put the programmatically generated workbook an event code similar to below:

Private Sub Worksheet_Change(ByVal Target As Range)

    Dim nextTarget As Range

    Set nextTarget = Range(Selection.Address) 'store the next range the user selects

    Target.Columns.Select 'autofit requires columns to be selected
    Target.Columns.AutoFit

    nextTarget.Select
End Sub

Use this to add a workbook and place a worksheet change event into the Sheet1 module.

Sub AddSht_AddCode()
    Dim wb As Workbook
    Dim xPro As VBIDE.VBProject
    Dim xCom As VBIDE.VBComponent
    Dim xMod As VBIDE.CodeModule
    Dim xLine As Long

    Set wb = Workbooks.Add

    With wb
        Set xPro = .VBProject
        Set xCom = xPro.VBComponents("Sheet1")
        Set xMod = xCom.CodeModule

        With xMod
            xLine = .CreateEventProc("Change", "Worksheet")
            xLine = xLine + 1
            .InsertLines xLine, "  Cells.Columns.AutoFit"
        End With
    End With

End Sub

When you 1st run the code you may get an error.

Hit the Stop Icon and select the tools menu and "References"

Then find "Microsoft Visual Basic for Applications Extensibility 5.3 library" and check it.

Run the code again and it should work.