Yeah, Kirk ... thanks. I subsequently discovered that as well, but the implementation that MS has for this leaves much to be desired, IMHO. I've done my own, which I borrowed and tweaked from some code somewhere (forgot where, it may have been CodeProject, but don't quote me on that). This class was subclassed from MyComboBox subclass, but it should probably work fine sub-classed from the System.Windows.Forms.ComboBox base class.

	public class MyComboBoxAutoComplete : MyComboBox
	{
		#region Declarations

		private bool InEditMode = true;

		#endregion

		#region Constructor

		public MyComboBoxAutoComplete()
		{
			this.DropDownStyle = ComboBoxStyle.DropDown;
			this.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
			this.AutoCompleteSource = AutoCompleteSource.ListItems;
		}
		#endregion

		#region Events

		protected override void OnBindingContextChanged(EventArgs e)
		{
			this.DropDownStyle = ComboBoxStyle.DropDown;
			base.OnBindingContextChanged(e);
		}
		protected override void OnValidating(CancelEventArgs e)
		{
			int index = this.FindStringExact(this.Text);
			if (index >= 0 || this.Text.Trim() == "")
				base.OnValidating(e);
			else
				e.Cancel = true;
		}
		protected override void OnKeyDown(KeyEventArgs e)
		{
			this.InEditMode = (e.KeyCode != Keys.Back && e.KeyCode != Keys.Delete);
			base.OnKeyDown(e);
		}
		protected override void OnTextChanged(EventArgs e)
		{
			if (this.InEditMode)
			{
				int index = this.FindString(this.Text);
				if (index < 0 && this.Text.Trim() != "")
				{
					this.InEditMode = false;
					this.Text = this.Text.Substring(0, this.Text.Length - 1);
					this.InEditMode = true;
					this.Select(this.Text.Length, this.Text.Length);
				}
			}

			base.OnTextChanged(e);
		}

		#endregion
	}

~~Bonnie


>Bonnie
>
>You may have this already figured out, but I just learned it.
>
>In winforms on the combobox, you set the Autocomplete source to listitems.
>
>Kirk