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| 23.63.2.Inference And Contravariance for Button Click, KeyPress, and MouseClick |
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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
class InferenceAndContravariance
{
static void LogPlainEvent(object sender, EventArgs e)
{
Console.WriteLine ("An event occurred");
}
static void Main()
{
Button button = new Button();
button.Text = "Click me";
button.Click += LogPlainEvent;
button.KeyPress += LogPlainEvent;
button.MouseClick += LogPlainEvent;
Form form = new Form();
form.AutoSize = true;
form.Controls.Add(button);
Application.Run(form);
}
}
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| 23.63.Event System | | 23.63.1. | Use .Net event system | | | | 23.63.2. | Inference And Contravariance for Button Click, KeyPress, and MouseClick | | |
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