thanks for the help. it works now

There is no "key off" event. Use the "KeyPress" event - not the "KeyDown" event Darryl Borden Principal IT Analyst dborden@eprod.com

That depends entirely on how your filling the ListView while your capturing packets. Are you letting the ListView update itself after filling it with data? Is your packet capture process running on the same thread of the UI? If so, then you're going to have to call Application.DoEvents to let the Window and it's controls redraw themselves. A better method would be to run the capture process on a seperate thread and have it post calls back to the Window with the ListView telling it to add the data, possibly using an event. Also, consider that you can't possibly update the ListView fast enough to post every packet that flies by as it does so. You might want to hold off updating the ListView until the capture is finished, then you can populate the ListView however you want. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Sorry my bad ... I think mav.northwind has provided the ideal example although there are ways to do it this example is ideal ... i didnt read it before i wrote the reply Pushkar Pathak

i am trying to establish parallel connection. So i want to send tcp SYN packet in parallel. i am using libnetNT.dll to create the packets for this i want to use threads. seperate threads for each packet

The RichTextBox can display documents in rtf format. Create a Word document, save it as rtf and load it into the richtextbox and youll see that it is rathe rpowerful. To understand how the text must be build to make certain formattings or colors I would suggest that you make samples of what you try to achieve in word and then look into the Rtf property. To just change the color (and also some other properties) of specific words or lines the following way is the easiest: 1. Call the Select method to select some part of the displayed text. 2. Set the SelectionColor property to change the color of the selected text.

You could also try using the System.BitConverter class. Kev

You could use get set, or you could just write a small function that returns the value. Exposing it is just a fancy way of saying 'make it public'.

Try checking out the documentation for TreeView.Nodes.Add(string)[^] on MSDN. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome