How to select listbox item by pressing enter key?

Question

IDE: Visual studio 2010, c# .net 4.0, winforms appication:

In my application I am showing list box. now I want to select a default item in list box [listbox selected index changed event will be called] ]when user presses enter key from keyboard.

Answer 1

Depending on where the Enter needs to be caught :

I take the KeyUp event, valid events here are the KeyPress, KeyDown and KeyUp events

public class YourFormOrControllerName : Form //Or UserControl
{
    private int yourDefaultValue = 0;
    public YourFormOrControllerName()
    {
        //whenever you haven't selected a specific control to setup (not a so good solution)
        //YourFormOrControllerName.KeyUp += HandleKeyUpSelected;

        //Whenever you Enter in the ListBox
        YourListBoxControlName.KeyUp += HandleKeyUpSelected;
    }

    private void HandleKeyUpSelected(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
        {
            YourListBoxControlName.SelectedIndex = yourDefaultValue;
        }
    }
}

as @Nyerguds commented below there are different arguments for the different events. For more information i refer to MSDN