button1 create button2 in form1 and if you press button2 it show a message like "hello World"

create button in run time and add what u want as event
like this:
..it's click event of button1 and in method must have argument
object x,eventargs xx

private void button1_Click(object sender, EventArgs e)
        {
            Button button2 = new Button();
            button2.Location = new System.Drawing.Point(100, 60);
            button2.Name = "but";
            button2.Size = new System.Drawing.Size(75, 23);
            //button2.TabIndex = 0;
            button2.Text = "button1";
            button2.UseVisualStyleBackColor = true;
            button2.Click+=new EventHandler(ok);
            this.Controls.Add(button2);
        }
        public void ok(object sender,EventArgs e)
        {
            MessageBox.Show("mohamed");
        }

Hi ZPS769,

You can drag and drop button 2 in your form and set its visibility to false.

On pressing button1 :

private void button1_Click(object sender, EventArgs e)
{
    button2.Visible = true;
}

and on Pressing button2 :

private void button2_Click(object sender, EventArgs e)
{
    MessageBox.Show("Hello world");
}

I hope this help
:)

You need to dynamically create a new button on Button1 click.
Then add that new button to controls in Form and set locations.
Also, you need to assign an event handler for new button click.
Then, you can do whatever while handling that event.