Something

System.Windows.Forms.Control FindControl(System.Windows.Forms.Control start, string id)
{
	System.Windows.Forms.Control foundControl;
	if (start != null)
	{

		foundControl = start.FindControl(id);
		if (foundControl != null)
			return foundControl;

		foreach (Control c in start.Controls)
		{
			foundControl = FindControl(c, id);
			if (foundControl != null)
				return foundControl;
	
		}

	}

	return null;

}