Button click handler : Introduction : GUI Windows Forms C# Examples

    
using  System;
using  System.Windows.Forms;
using  System.Drawing;

public  class  ButtonClickEvent  :  System.Windows.Forms.Form
{
    private  System.Windows.Forms.Button  button1;
    private  System.Windows.Forms.TextBox  textBox1;

    public  ButtonClickEvent()
    {
        Text  =  "Test  WinForm";

        ForeColor  =  System.Drawing.Color.Yellow;

        button1  =  new  System.Windows.Forms.Button();
        textBox1  =  new  System.Windows.Forms.TextBox();

        //  button  control  and  its  properties
        button1.Location  =  new  System.Drawing.Point(8,  32);
        button1.Name  =  "button1";
        button1.Size  =  new  System.Drawing.Size(104,  32);
        button1.TabIndex  =  0;
        button1.Text  =  "Click  Me";
                
        //  text  box  control  and  its  properties
        textBox1.Location  =  new  System.Drawing.Point(24,  104);
        textBox1.Name  =  "textBox1";
        textBox1.Size  =  new  System.Drawing.Size(184,  20);
        textBox1.TabIndex  =  1;
        textBox1.Text  =  "textBox1";
                
        //  Adding  controls  to  the  fomr
        Controls.AddRange(new  System.Windows.Forms.Control[]{textBox1,  button1}  );

        button1.Click  +=  new  System.EventHandler(button1_Click);
                                        
    }

    private  void  button1_Click(object  sender,System.EventArgs  e)
    {
        textBox1.Text  =  "Button  is  clicked";
        MessageBox.Show("Button  is  clicked");
    }

    public  static  int  Main()
    {
        Application.Run(new  ButtonClickEvent());
        return  0;
    }              
}