Thanks Bonnie,

Actually it was this line:

[DesignerAttribute(typeof(System.Windows.Forms.Design.ControlDesigner))]

I removed it and it all works ok now.

>Stephane,
>
>I've not used a TabControl yet, but I *have* subclassed lots of controls. I think the line that's causing you grief might be:
>

>		private void InitializeComponent()
>		{
>			System.ComponentModel.Container components = new Container();
>		}
>

>Try removing that line and see what happens.
>
>~~Bonnie
>
>
>>I'm tring to subclass a TabControl control and add it to my toolbox, when i try to use it and add pages, i cannot access the pages, what am i doing wrong ?
>>
>>Here's the code:
>>
>>

>>using System;
>>using System.Collections;
>>using System.ComponentModel;
>>using System.ComponentModel.Design;
>>using System.Drawing;
>>using System.Windows.Forms;
>>
>>
>>namespace Test.GUI
>>{
>>
>>	[ToolboxBitmap(typeof(TabControl))]
>>	[DesignerAttribute(typeof(System.Windows.Forms.Design.ControlDesigner))]	
>>	public class _TabControl : System.Windows.Forms.TabControl
>>	{
>>		private System.ComponentModel.Container components = null;
>>
>>		public _TabControl()
>>		{
>>			InitializeComponent();
>>		}
>>		private void InitializeComponent()
>>		{
>>			System.ComponentModel.Container components = new Container();
>>		}
>>	
>>		protected override void Dispose( bool disposing )
>>		{
>>			if( disposing )
>>			{
>>				if( components != null )
>>					components.Dispose();
>>			}
>>			base.Dispose( disposing );
>>		}
>>	}
>>}
>>