How implement arq (stop and wait) in streaming video from camera using afroge framwork

See more:

C#

hello every one

I am try to make program that record video from HD camera and i make that already ( use web camera ).

My problem now with use ARQ protocol (STOP AND WAIT ) with packet lost, so how i can use this protocol in C# . i am using AFroge framwork.

http://e.top4top.net/p_462d081.png[^]

What I have tried:

I found this code in google but i do not know where i can use and how

objselected_frame_stp_wt is the frame we selected from Transmitter listBox
dtimeout is our predetermined timeout
tsSend_Time is a timespan object calculated by a timer
objFrame and objAck are objects from class clssSqaure, responsible for creating and moving the primitives

code:

if (objselected_frame_stp_wt != null)
        {
            if (tsSend_Time.Seconds > dtimeout)//send time exceeded predetermined timeout
            {
                if (bsend_file) //Rx didn't receive Frame
                    lbl_receiver.Text = "Timeout";

                else            //Tx didn't receive Acknowledgment
                    lbl_sender.Text = "Timeout";

                timer1.Enabled = false;//stop sending
            }

            if (bsend_file)//Frame is being sent to Rx
            {
                if (LBx_Receiver.Items.Contains(objselected_frame_stp_wt))
                    lbl_sender.Text = "Resending " + objselected_frame_stp_wt.ToString();
                else
                    lbl_sender.Text = "Sending " + objselected_frame_stp_wt.ToString();

                if ((objFrame.Fxpos + dlen) > nwidth)//frame arrived to Rx
                {
                    if (!LBx_Receiver.Items.Contains(objselected_frame_stp_wt))
                    {
                        LBx_Receiver.Items.Add(objselected_frame_stp_wt);
                    }
                    lbl_sender.Text = "awaiting acknowledgement";
                    lbl_receiver.Text = "sending acknowledgement";
                    bsend_file = false;
                    dtstart = DateTime.Now;
                    objAck = new clssSqaure(nwidth, -20, -1, color_yellow);
                    lst_clssSqaure.Add(objAck);
                }
                objFrame.Fxpos += fspeed * objFrame.Fvec_X;
            }
            else//Ack is being sent to Tx
            {
                if (((objAck.Fxpos - dlen + 10) < (nwidth * -1)))//Ack arrived to Tx
                {
                    lbl_sender.Text = "Acknowledgement received";
                    if (LBx_Receiver.Items.Contains(objselected_frame_stp_wt))
                    {
                        LBx_Sender.Items.Remove(objselected_frame_stp_wt);
                    }
                    timer1.Enabled = false;
                    bsend_file = true;
                }
                objAck.Fxpos += fspeed * objAck.Fvec_X;
            }
        }