Focus Form

   

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace Wrox.ProgrammingWindowsGUI.Chapter5
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class FocusForm : System.Windows.Forms.Form
    {
        private System.Windows.Forms.TextBox txtFocusForm;
        private System.Windows.Forms.Button btFocusForm;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;


        public FocusForm()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.txtFocusForm = new System.Windows.Forms.TextBox();
            this.btFocusForm = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // txtFocusForm
            // 
            this.txtFocusForm.Location = new System.Drawing.Point(8, 8);
            this.txtFocusForm.Name = "txtFocusForm";
            this.txtFocusForm.Size = new System.Drawing.Size(336, 20);
            this.txtFocusForm.TabIndex = 0;
            this.txtFocusForm.Text = "";
            this.txtFocusForm.LostFocus += new System.EventHandler(this.txtFocusForm_LostFocus);
            this.txtFocusForm.GotFocus += new System.EventHandler(this.txtFocusForm_GotFocus);
            // 
            // btFocusForm
            // 
            this.btFocusForm.Location = new System.Drawing.Point(8, 40);
            this.btFocusForm.Name = "btFocusForm";
            this.btFocusForm.Size = new System.Drawing.Size(336, 23);
            this.btFocusForm.TabIndex = 1;
            this.btFocusForm.Text = "This button does nothing";
            this.btFocusForm.Click += new System.EventHandler(this.btFocusForm_Click);
            // 
            // FocusForm
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(352, 70);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.btFocusForm,
                                                                          this.txtFocusForm});
            this.MaximizeBox = false;
            this.Name = "FocusForm";
            this.Text = "FocusForm";
            this.ResumeLayout(false);

        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new FocusForm());
        }

        protected void txtFocusForm_LostFocus(object sender, EventArgs e)
        {
            // MessageBox.Show("Goodbye!");
        }

        protected void txtFocusForm_GotFocus(object sender, EventArgs e)
        {
            // MessageBox.Show("Hello!");
        }

        private void btFocusForm_Click(object sender, System.EventArgs e)
        {
            bool canFocus = txtFocusForm.CanFocus;
            bool containsFocus = this.ContainsFocus;
            bool focused = txtFocusForm.Focused;

            MessageBox.Show("Textbox can focus: " + canFocus +
                         "
Form children contain focus: " + containsFocus +
                         "
Textbox has focus: " + focused);

            txtFocusForm.Focus();
        }

        
    }
}