http://blogs.msdn.com/b/vbteam/archive/2008/12/30/system-diagnostics-process-avoid-deadlocks-in-redirectstandardinput-output-lucian-wischik.aspxIt's common that you want to launch an external process but supply input and capture the output. Here's one attempt: ' BAD CODE Using p As New System.Diagnostics.Process p.StartInfo.FileName = "cat" p.StartInfo.UseShellExecute = False pen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/vbteam/archive/2008/12/30/system-diagnostics-process-avoid-deadlocks-in-redirectstandardinput-output-lucian-wischik.aspx#9290675Thu, 08 Jan 2009 01:17:11 GMT91d46819-8472-40ad-a661-2c78acb4018c:9290675Ted<p>The code has another bug. &nbsp;The sub-process executed could hang or go into an infinite loop and never terminate. &nbsp;</p> <p>This is the basic case of not blocking on a subprocess by creating a thread to load and execute it. &nbsp;It has nothing really to do with standard input and standard output.</p> <p>P.s. Thanks for referring to the old unix cat utility. &nbsp;I've used many of them, sed and tiffcp especially, for processing data from within a .net application.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9290675" width="1" height="1">http://blogs.msdn.com/b/vbteam/archive/2008/12/30/system-diagnostics-process-avoid-deadlocks-in-redirectstandardinput-output-lucian-wischik.aspx#9257345Tue, 30 Dec 2008 20:19:25 GMT91d46819-8472-40ad-a661-2c78acb4018c:9257345System.Diagnostics.Process: avoid deadlocks in RedirectStandardInput/Output (Lucian Wischik) | Coded Style<p>PingBack from <a rel="nofollow" target="_new" href="http://www.codedstyle.com/systemdiagnosticsprocess-avoid-deadlocks-in-redirectstandardinputoutput-lucian-wischik/">http://www.codedstyle.com/systemdiagnosticsprocess-avoid-deadlocks-in-redirectstandardinputoutput-lucian-wischik/</a></p> <img src="http://blogs.msdn.com/aggbug.aspx?PostID=9257345" width="1" height="1">