Return Image from function in ASP.Net using VB.Net

Please help i would want to pass a string to to it then return a barcoded image so that i can put it on my rdlc report

 Dim barCode As String = txtBarcode.Text
    Using bitMap As New Bitmap(barCode.Length * 40, 80)
        Using graphics__1 As Graphics = Graphics.FromImage(bitMap)
            Dim oFont As New Font("IDAutomationHC39M Free Version", 16)
            Dim point As New PointF(2.0F, 2.0F)
            Dim blackBrush As New SolidBrush(Color.Black)
            Dim whiteBrush As New SolidBrush(Color.White)
            graphics__1.FillRectangle(whiteBrush, 0, 0, bitMap.Width, bitMap.Height)
            graphics__1.DrawString("*" & barCode & "*", oFont, blackBrush, point)
        End Using
        Using ms As New MemoryStream()
            bitMap.Save(ms, ImageFormat.Png)
            imgBarcode.ImageUrl = "data:image/png;base64," & Convert.ToBase64String(ms.ToArray())
            imgBarcode.Visible = True
        End Using
    End Using