C#

R.Bischoff 
.NET, Kommst du mit?

// Initialize the TabPage and its contents
TabPage page = new TabPage("Second");
//...

tabControl1.TabPages.Add(page);
tabControl1.SelectedTab = page;

private delegate void RemoveHandler(TabPage);
//...
private void removeButton_Click(object sender, EventArgs e)
{
  Button b = sender as Button; if (b == null) return;
  TabPage tab = b.Parent as TabPage; if (tab == null) return;
  if (this.tabControl1.InvokeRequired)
  {
    RemoveHandler handler =
      new RemoveHandler(this.tabControl1.TabPages.Remove);
    this.tabControl1.Invoke(d, new object[] {tab});
  }
  else this.tabControl1.TabPages.Remove(tab);
}

public static void Main(string[] args)
{
  Application.ThreadException +=
    new ThreadExceptionEventHandler(UnhandledException);
  Application.Run(new FormRegisterConsole());
}
 
private static void UnhandledException(object sender,
  ThreadExceptionEventArgs e)
{
  if (e.Exception is ErrorDataRowException)
  {
    //...
  }
  else
  {
    //...
  }
}

using System;
using System.Windows.Forms;

namespace Test
{
	public class Pipe : Control
	{
		public Pipe(){	
			   
		}

		protected override void OnMouseDown(MouseEventArgs e)
		{
			MessageBox.Show("a mouse was clicked and my object knows it");
			base.OnMouseDown(e);
		}
	}
}