Custom Controls And Events

[rich_wenger]

I've go a Custom Control that inherits from the TextBox class and I've added a ListBox; I needed to create a custom event exposed to the parent form that would fire when the ListBox changed visiblity. The code below works but I know it's now quite right. Any help appreciated. Control Code Snippet============================================== using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; public delegate void ListBoxEvent(); namespace TextBoxLookupLib { /// /// Custom Textbox Control /// public class TextBoxLookup : System.Windows.Forms.TextBox { private System.Windows.Forms.ListBox listBox1; /// /// Required designer variable. /// private System.ComponentModel.Container components = null; public event ListBoxEvent ListBoxVisibleChanged; public TextBoxLookup() { // This call is required by the Windows.Forms Form Designer. InitializeComponent(); // TODO: Add any initialization after the InitComponent call this.listBox1.Visible = false; this.listBox1.Width = this.Width; this.listBox1.TabStop = false; this.DoubleClick +=new EventHandler(TextBoxLookup_DoubleClick); this.listBox1.DoubleClick +=new EventHandler(listBox1_DoubleClick); this.listBox1.VisibleChanged +=new EventHandler(listBox1_VisibleChanged); ListBoxVisibleChanged += new ListBoxEvent(OnListBoxVisibleChanged); } /// /// Clean up any resources being used. /// protected override void Dispose( bool disposing ) { if( disposing ) { if( components != null ) components.Dispose(); } base.Dispose( disposing ); } #region Component Designer generated code /// /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this.listBox1 = new System.Windows.Forms.ListBox(); // // listBox1 // this.listBox1.Location = new System.Drawing.Point(17, 17); this.listBox1.Name = "listBox1"; this.listBox1.TabIndex = 0; } #endregion private void OpenListBox() { Control ctlParent = this.Parent; ctlParent.Controls.Add(this.listBox1); this.listBox1.Width = this.Width; this.listBox1.BringToFront(); this.listBox1.Visible = true; } private void CloseListBox() { this.Focu