using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; public class FocusForm : System.Windows.Forms.Form { private System.Windows.Forms.TextBox txtFocusForm; private System.Windows.Forms.Button btFocusForm; public FocusForm() { this.txtFocusForm = new System.Windows.Forms.TextBox(); this.btFocusForm = new System.Windows.Forms.Button(); this.SuspendLayout(); this.txtFocusForm.Location = new System.Drawing.Point(8, 8); this.txtFocusForm.Size = new System.Drawing.Size(336, 20); this.txtFocusForm.LostFocus += new System.EventHandler(this.txtFocusForm_LostFocus); this.txtFocusForm.GotFocus += new System.EventHandler(this.txtFocusForm_GotFocus); this.btFocusForm.Location = new System.Drawing.Point(8, 40); this.btFocusForm.Size = new System.Drawing.Size(336, 23); this.btFocusForm.Click += new System.EventHandler(this.btFocusForm_Click); 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.ResumeLayout(false); } [STAThread] static void Main() { Application.Run(new FocusForm()); } protected void txtFocusForm_LostFocus(object sender, EventArgs e) { Console.WriteLine("Goodbye!"); } protected void txtFocusForm_GotFocus(object sender, EventArgs e) { Console.WriteLine("Hello!"); } private void btFocusForm_Click(object sender, System.EventArgs e) { bool canFocus = txtFocusForm.CanFocus; bool containsFocus = this.ContainsFocus; bool focused = txtFocusForm.Focused; Console.WriteLine("Textbox can focus: " + canFocus + " Form children contain focus: " + containsFocus + " Textbox has focus: " + focused); txtFocusForm.Focus(); } }