C#

public class TransparentControl : Label<br />
	{<br />
		protected override CreateParams CreateParams<br />
		{<br />
			get<br />
			{<br />
				CreateParams cp = base.CreateParams;<br />
				cp.ExStyle |= 0x00000020; //WS_EX_TRANSPARENT<br />
				return cp;<br />
			}<br />
		}<br />
	}

SetStyle(ControlStyles.SupportsTransparentBackColor, true)

create procedure EmployeeCreate (@name varchar(20), @dept varchar(20), @employeeid numeric out)<br />
as<br />
begin<br />
insert into Emplyee (Name, Department) values (@name, @dept)<br />
select @employeeid = @@identity<br />
end

public class MyForm:Form<br />
{<br />
  private bool _cancelButtonClicked = false;<br />
  private void cancelbutton_clicked(..)<br />
  {<br />
    _cancelButtonClicked = true;<br />
  }<br />
  private void form_closing(..)<br />
  {<br />
     if (_cancelButtonClicked)<br />
     {<br />
        //User clicked the button with the dialog result == cancel<br />
     }<br />
     else<br />
     {<br />
        //User clicked X button to close the form<br />
     }<br />
  }<br />
}

private const int WM_SYSCOMMAND = 0x112; 
private const int SC_CLOSE = 0xF060;

protected override void WndProc(ref Message m)
{
     if (m.Msg == WM_SYSCOMMAND && m.WParam.ToInt32() == SC_CLOSE)
     {
          //do something here
     }
}