C#

public class Form1 : System.Windows.Forms.Form
{
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Button button2;

  private System.ComponentModel.Container components = null;

	public Form1()
	{
		InitializeComponent();
	}

	protected override void Dispose( bool disposing )
	{
		if( disposing )
		{
			if (components != null) 
			{
				components.Dispose();
			}
		}
		base.Dispose( disposing );
	}

	private void InitializeComponent()
	{
    this.button1 = new System.Windows.Forms.Button();
    this.button2 = new System.Windows.Forms.Button();
    this.SuspendLayout();

    this.button1.Location = new System.Drawing.Point(64, 112);
    this.button1.Name = "button1";
    this.button1.TabIndex = 0;
    this.button1.Text = "button1";
    this.button1.Click += new System.EventHandler(this.button1_Click);

    this.button2.Location = new System.Drawing.Point(160, 112);
    this.button2.Name = "button2";
    this.button2.TabIndex = 1;
    this.button2.Text = "button2";
    this.button2.Visible = false;
    this.button2.Click += new System.EventHandler(this.button2_Click);

    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                this.button2,
                                                                this.button1});
    this.Name = "Form1";
    this.Text = "Form1";
    this.ResumeLayout(false);

  }
	
	private void button1_Click(object sender, System.EventArgs e)
  {
    button2.Visible = true;
    button1.Visible = false;
  }

  private void button2_Click(object sender, System.EventArgs e)
  {
    button2.Visible = false;
    button1.Visible = true;
  }
}

ucInit1.button.Clicked += new EventHandler(ShowUCCreate);

....

void ShowUCCreate(object sender, EventArgs e)
{
  UCCreate newPanel = new UCCreate();
  newPanel.Location = new Point(376, 8);
  newPanel.Size = new Size (280, 140);
  this.Parent.Controls.Add(newPanel);
}

delegate void FooHandler(string name);

class ABC
{
  public FooHandler Foo;

  public void InvokeFoo()
  {
    Foo("Hello from ABC");
  }
}

class XYZ
{
  static void MyFoo(string name)
  {
    Console.WriteLine(name);
  }

  static void Main()
  {
    ABC abc = new ABC();
    abc.Foo = new FooHandler(MyFoo);
    abc.InvokeFoo();
  }
}

<font color="#0000FF">private</font> <font color="blue">void</font><font color="blue"></font> button2_Click(<font color="#0000FF">object</font> sender,<font color="blue"></font> System.EventArgs e) <br> 	{ <br> 		Form2 frm=<font color="#0000FF">new</font> Form2(<font color="blue"></font><font color="blue"></font>); <br> 		<font color="#0000FF">int</font> x=<font color="#0000FF">this</font>.Location.X; <br> 		<font color="#0000FF">int</font> y=<font color="#0000FF">this</font>.Location.Y; <br> 		frm.Show(<font color="blue"></font><font color="blue"></font>); <br> 		frm.Location=<font color="#0000FF">new</font> Point(x-10,y-10); <font color="DarkGreen">// offset Form2 by 10 pixels X and Y from Form1 <br></font><br> 	} <br> 

<font color="blue">Public Function</font> TwinsOnWay(<font color="blue">ByVal</font> twins <font color="blue">As String</font>) <font color="blue">As String <br>     Select Case</font> twins<br>         <font color="blue">Case</font> "Gender" <br>             <font color="blue">Return</font> "Two Girls" <br>     <font color="blue">End Select <br> End Function</font> <br> 

private <font color="blue">void</font><font color="blue"></font> Form1_Load(object sender,<font color="blue"></font> System.EventArgs e) <br> 	{ <br> 		richTextBox1.AppendText("some\ttext\twith\ttabs\tin\tthere"); <font color="#006400">/// 5 tabs in a line.</font> <br> 	} <br> <font color="blue"></font><font color="blue"></font> <br> private <font color="blue">void</font><font color="blue"></font> button1_Click(object sender,<font color="blue"></font> System.EventArgs e) <br> 	{ <br> 		MessageBox.Show(richTextBox1.Lines[0].Split('\t').GetUpperBound(0).ToString(<font color="blue"></font>));<font color="DarkGreen"> // 0 is the first line in the richtextbox, upperbound is the count of tabs. <br></font><br> 	} <br> 

<font color="blue">Public Function</font> TwinsOnWay(<font color="blue">ByVal</font> twins <font color="blue">As String</font>) <font color="blue">As String <br>     Select Case</font> twins<br>         <font color="blue">Case</font> "Gender" <br>             <font color="blue">Return</font> "Two Girls" <br>     <font color="blue">End Select <br> End Function</font> <br>