ListBox.ObjectCollection Class

	internal System.Windows.Forms.ListBox ListBox1;

	private void InitializeOwnerDrawnListBox()
	{
		this.ListBox1 = new System.Windows.Forms.ListBox();

		// Set the location and size.
		ListBox1.Location = new Point(20, 20);
		ListBox1.Size = new Size(240, 240);

		// Populate the ListBox.ObjectCollection property 
		// with several strings, using the AddRange method.
		this.ListBox1.Items.AddRange(new object[]{"System.Windows.Forms", 
			"System.Drawing", "System.Xml", "System.Net", "System.Runtime.Remoting", 
			"System.Web"});

		// Turn off the scrollbar.
		ListBox1.ScrollAlwaysVisible = false;

		// Set the border style to a single, flat border.
		ListBox1.BorderStyle = BorderStyle.FixedSingle;

		// Set the DrawMode property to the OwnerDrawVariable value. 
		// This means the MeasureItem and DrawItem events must be 
		// handled.
		ListBox1.DrawMode = DrawMode.OwnerDrawVariable;
		ListBox1.MeasureItem += 
			new MeasureItemEventHandler(ListBox1_MeasureItem);
		ListBox1.DrawItem += new DrawItemEventHandler(ListBox1_DrawItem);
		this.Controls.Add(this.ListBox1);
		
	}


	// Handle the DrawItem event for an owner-drawn ListBox.
	private void ListBox1_DrawItem(object sender, DrawItemEventArgs e)
	{

		// If the item is the selected item, then draw the rectangle
		// filled in blue. The item is selected when a bitwise And  
		// of the State property and the DrawItemState.Selected 
		// property is true.
		if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
		{
			e.Graphics.FillRectangle(Brushes.CornflowerBlue, e.Bounds);
		}
		else
		{
			// Otherwise, draw the rectangle filled in beige.
			e.Graphics.FillRectangle(Brushes.Beige, e.Bounds);
		}

		// Draw a rectangle in blue around each item.
		e.Graphics.DrawRectangle(Pens.Blue, e.Bounds);

		// Draw the text in the item.
		e.Graphics.DrawString(ListBox1.Items[e.Index].ToString(),
			this.Font, Brushes.Black, e.Bounds.X, e.Bounds.Y);

		// Draw the focus rectangle around the selected item.
		e.DrawFocusRectangle();
	}

	// Handle the MeasureItem event for an owner-drawn ListBox.
	private void ListBox1_MeasureItem(object sender, 
		MeasureItemEventArgs e)
	{

		// Cast the sender object back to ListBox type.
		ListBox theListBox = (ListBox) sender;

		// Get the string contained in each item.
		string itemString = (string) theListBox.Items[e.Index];

		// Split the string at the " . "  character.
		string[] resultStrings = itemString.Split('.');

		// If the string contains more than one period, increase the 
		// height by ten pixels; otherwise, increase the height by 
		// five pixels.
		if (resultStrings.Length>2)
		{
			e.ItemHeight += 10;
		}
		else
		{
			e.ItemHeight += 5;
		}

	}

	an owner-drawn ListBox by setting the the DrawMode property to OwnerDrawVariable value and
	handling the DrawItem and MeasureItem events.  It also demonstrates setting the 
	BorderStyle and ScrollAlwaysVisible properties and using the AddRange method.

	To run this example paste it in an empty form that imports the System.Drawing
	namespace and the System.Windows.Forms namespace.