How can you add your own print and export buttons to the CR viewer toolbar?

Question

I posted a previous question that was asking how to get around the Information Bar in IE7 when you export and print.  Unfortunately the CR viewer file download code gets blocked by IE7 because the buttons don't directly download the file.  However, I have been able to get a regular button that calls the following code and streams the file to the client and IE7 does not block it. 
Sub PrintPDF(sender As Object, e As System.EventArgs)
     Dim crReportDocument as ReportDocument
     Dim crExportOptions as ExportOptions
     Dim crDiskFileDestinationOptions as DiskFileDestinationOptions
     Dim Fname as string
     CrReportDocument = New ReportDocument()
     CrReportDocument.Load(Server.MapPath("estactionlist.rpt"))
     Fname = Server.MapPath("./") & Session.SessionID.ToString & ".pdf"
     CrDiskFileDestinationOptions = New DiskFileDestinationOptions()
     CrDiskFileDestinationOptions.DiskFileName = FName
     CrExportOptions = crReportDocument.ExportOptions
     With crExportOptions
          .DestinationOptions = CrDiskFileDestinationOptions
          .ExportDestinationType = ExportDestinationType.DiskFile
          .ExportFormatType = ExportFormatType.PortableDocFormat
     End With
     CrReportDocument.Export()
     Response.ClearContent()
     Response.ClearHeaders()
                Response.AddHeader("content-disposition", "attachment;filename=test.pdf")
                Response.ContentType = "application/pdf"
                Response.Charset = ""
                Response.WriteFile(Fname)
                Response.Flush()
     Response.Close()
     System.IO.File.Delete(Fname)
End Sub
So here are my questions?
1. Is it possible to add a custom print control/icon to the CR viewer toolbar?
2. If one is not possible, then is it possible to override the CR viewer print and export buttons with your own subroutines like the one above?
I just want my page to look nice and hate to have print and export buttons outside of my CR viewer. 
Thanks,
Kevin

Answer 1

It might be possible to replace the buttons in a windows app since you can retrieve the toolbar as a toolbar object in the winform viewer  ( ToolStrip toolBar = (ToolStrip) crystalReportViewer1.Controls[3]; )  however with a web app, it's a lot more difficult.
The problem is that that you need to parse the Request string to try and figure out if the print / export button was clicked.  The code below makes the print button disappear if you click it, so you should be able to modify it to call your custom printing / exporting code instead  (You have to do this check in a postback)
        Dim I As Integer = 0
        If Request.Form.AllKeys.Length > 0 Then
            For I = 0 To Request.Form.AllKeys.Length - 1
                Response.Write(Request.Form.Keys(I).ToString & "<BR>")
                If Request.Form.Keys(I).ToString = "CrystalReportViewer2:_ctl2:_ctl2.x" Then
                    CrystalReportViewer2.HasPrintButton = False
                End If
            Next
       End If
Shawn