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I have a program that monitors debug messages and I have tried using a TextBox and appended the messages to it but it doesn't scale very well and slows way down when the number of messages gets large. I then tried a ListBox but the scrolling was snapping to the top when appending new messages. It also doesn't allow for cut and paste like the text box does. What is a better way to implement a console like element embedded in a winforms window. Edit: I would still like to be able to embed a output window like visual studio but since I can't figure out an easy way here are the two solutions I use. In addition to using the RichTextBox which works but you have to clear it every now and then. I use a console that I pinvoke. Here is a little wrapper class that I wrote to handle this. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Runtime.InteropServices; namespace Con { class Ext_Console { static bool console_on = false; public static void Show(bool on,string title) { console_on = on; if (console_on) { AllocConsole(); Console.Title = title; // use to change color Console.BackgroundColor = System.ConsoleColor.White; Console.ForegroundColor = System.ConsoleColor.Black; } else { FreeConsole(); } } public static void Write(string output) { if (console_on) { Console.Write(output); } } public static void WriteLine(string output) { if (console_on) { Console.WriteLine(output); } } [DllImport("kernel32.dll")] public static extern Boolean AllocConsole(); [DllImport("kernel32.dll")] public static extern Boolean FreeConsole(); } } // example calls Ext_Console.Write("console output ");

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