C#

private ManualeResetEvent m_Done = new ManualeResetEvent(false);
private int m_Delay = 1000; // time to wait between each send
public void SendToPort()
{
 while (true)
 {
   this.m_Port.Send(new byte[1]{1});
   // wait m_Delay ms if we should abort
   if (m_Done.WaitOne(this.Delay,false) )
      break;
 }
}

Modal dlgModal = new Modal(this);
dlgModal.ShowDialog();

class Modal : Form
{
   Form parentForm;

   public Modal(Form parentForm)
   {
      this.parentForm = parentForm;
   }
}

public delegate void MessagePostedEventHandler(object sender,string message);

public class Messenger {
  public event MessagePostedEventHandler MessagePosted;

  public void PostMessage(String message) {
    if(MessagePosted != null) {
      MessagePosted(this,message);
    }
  }
}

oMailItem.HTMLBody = sHtml + oMailItem.HTMLBody;

<br />
SetStyle(ControlStyles.ResizeRedraw, true);<br />

//set this property to true in the initComponent or whatever.
this.ResizeRedraw = true;
override void Form1_Paint(object sender, Forms.PaintEventArgs e)
{
   e.Graphics.DrawLine(Pens.Black,new rectangle());
}
//And you may add this to asure.
void Form_Resize()
{
   this.Invalidate();
}