C#

private void rtBox_Main_MouseDown(object sender, MouseEventArgs e)
{
	// get mouse coordinates
	Point mouse = new Point ( e.X , e.Y ) ;

	// Figure out if "mouse" is on the edge of an image,
	// if it is, the user is trying to resize the image, so
	// save the point in a member variable for later use.
	_pointMouseDown = mouse ;
	_resizingImage = true ;
}

private void rtBox_Main_MouseUp(object sender, MouseEventArgs e)
{
	if ( _resizingImange )
	{
		Point mouse = new Point ( e.X , e.Y ) ;

		// Use the difference between "mouse" and "_pointMouseDown"
		// to find the new dimensions the user wants for the image.
	}
}

Marcel Vreuls wrote:

Is there a way to retrieve the current valid smtp server of the computer or read out of outlook and use that one.

myListBox.Items[myListBox.SelectedIndex ].Text = "My New Value";

myListBox.Items[ 4 ].Text = "Item 4 Text";

public void Test<T>(IList<T> list)
{
  if (list.Count > 0)
  {
    Console.WriteLine("Hello");
  }
}