how to add data to an excel chart using an arraylist

How can I add a series of 256 points to an Excel chart ? I have the code below however I can;t seem to find an add data property to the chart object?

Dim objApp As Excel.Application
        Dim objBook As Excel._Workbook
        Dim objBooks As Excel.Workbooks
        Dim objSheets As Excel.Sheets
        Dim objSheet As Excel._Worksheet
        Dim range As Excel.Range
        Dim chart As Excel.Chart

        ' Create a new instance of Excel and start a new workbook.
        objApp = New Excel.Application()
        objBooks = objApp.Workbooks
        objBook = objBooks.Add
        objSheets = objBook.Worksheets
        objSheet = objSheets(1)
        objApp.Visible = True
        objApp.UserControl = True
        'Add in Header Graph.
        objSheet.Shapes.AddPicture("C:\Header.png",
             Microsoft.Office.Core.MsoTriState.msoFalse,
             Microsoft.Office.Core.MsoTriState.msoCTrue, 50, 50, 0, 45)
        'Add in DataChart

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