Csharp/C Sharp/GUI Windows Form/Focus

Focus Form

<source lang="csharp"> /* 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.ruponentModel; 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.ruponentModel.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 +
                        "\nForm children contain focus: " + containsFocus +
                        "\nTextbox has focus: " + focused);
           txtFocusForm.Focus();
       }
       
   }

}

      </source>