Hide external application

[wakeup]

In my application I have to call to an external application which when finishes popups a window saying only that all was ok. This external program doesn't have parameters to avoid that window.

There is any way to hide this window?
Thanks!

I use this code:


System.Diagnostics.Process proc = new System.Diagnostics.Process();
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.CreateNoWindow = true;
proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
proc.StartInfo.FileName = "xxxx";
proc.StartInfo.RedirectStandardError = false;
proc.StartInfo.RedirectStandardOutput = false;
proc.StartInfo.CreateNoWindow = true;
proc.Start();