C#

class Class1
{
    public void ChangeTextctl ( string text , System.Windows.Forms.Control ctl )
    {
        ctl.Text = text;
    }
}

Class1 cls = new Class1();
cls.ChangeTextctl("Test", button1);

// Assumes form already contains a Label (label1).
public partial class WinForm : Form
{
    private Calc calc;
    public WinForm()
    {
        InitializeComponent();
        calc = new Calc();
        calc.CalcResult += new EventHandler<CalcResultEventArgs>(calc_CalcResult);
        calc.Add(3.14159265f);
    }

    void calc_CalcResult(object sender, CalcResultEventArgs e)
    {
        label1.Text = e.ResultAsString;
    }
}

public class Calc
{
    public event EventHandler<CalcResultEventArgs> CalcResult;

    public float Value
    {
        get;
        private set;
    }

    public void Add(float number)
    {
        Value += number;
        OnCalcResult(new CalcResultEventArgs(Value.ToString()));
    }

    protected virtual void OnCalcResult(CalcResultEventArgs e)
    {
        EventHandler<CalcResultEventArgs> eh = CalcResult;
        if (eh != null)
            eh(this, e);
    }
}

public class CalcResultEventArgs : EventArgs
{
    public CalcResultEventArgs(string resultAsString)
    {
        ResultAsString = resultAsString;
    }

    public string ResultAsString
    {
        get;
        private set;
    }
}

Helfdane wrote:

reminds himself not to start coding too early in the morning

Christian Graus wrote:

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

SqlConnection conn;
SqlTransaction trans;

try {
  conn = new SqlConnection(connectionString);
  conn.Open();
  SqlTransaction trans = conn.BeginTransaction();
}
catch (SomeTypeOfException ex) {
  // deal with exception
}
finally {
  // transaction as well??

  if (conn != null) {
    conn.Close();
    conn.Dispose();
  }
}

// if we've got a trasnaction carry on:
if (trans != null) {
  try {
    string query = "query goes here";
    SqlCommand command = new SqlCommand(query, conn, trans);
    // add parameters
    command.ExecuteNonQuery();
    trans.Commit();
  }
  catch (SomeOtherException ex) {
    // deal with exception
   trans.Rollback();
  }
  finally {
    if (conn != null) {
      conn.Close();
      conn.Dispose();
    }
  }
}