C#

//.*\n|/\*.*\*/

private const int VK_LEFT = 0x25;
private const int VK_UP = 0x26;
private const int VK_RIGHT = 0x27;
private const int VK_DOWN = 0x28;
private const int VK_MENU = 0x12;

private const int WM_SYSKEYDOWN = 0x0104;
private const int WM_SYSKEYUP = 0x0105;

protected override void WndProc(ref Message m)
{
    switch (m.Msg)
    {
        case WM_SYSKEYDOWN: //Some Alt+Key was pressed
            if (m.WParam.ToInt32() == VK_DOWN) //Alt+Down
            {
                MessageBox.Show("User pressed Alt+Down");
            }
            break;
    }

    base.WndProc(ref m);
}

batmanAgen wrote:

although my listbox flickers a bit

myListBox.BeginUpdate();
// refresh contents of myListBox
myListBox.EndUpdate();