C#

class YourClassName<br />
{<br />
  const int LVM_FIRST  = 0x1000;<br />
  const int LVM_GETSUBITEMRECT = (LVM_FIRST + 56);<br />
  const int LVIR_BOUNDS = 0;<br />
  const int LVIR_ICON = 1;<br />
<br />
  [StructLayout(LayoutKind.Sequential)]<br />
  struct RECT<br />
  {<br />
    public int left;<br />
    public int top;<br />
    public int right;<br />
    public int bottom;<br />
  };<br />
  [DllImport("user32.dll")]<br />
  private static extern int SendMessage(IntPtr hWnd, int wMsg, int wParam, ref RECT lParam );<br />
  <br />
private void listView1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)<br />
{<br />
  RECT myrect;<br />
  ListViewItem lvitem = listView1.FocusedItem;<br />
  int wParam = lvitem.Index;<br />
  int intLVSubItemIndex;<br />
  ListViewItem.ListViewSubItem LVSubItem = null;<br />
  int intSendMessage;<br />
<br />
  for( intLVSubItemIndex = 1; intLVSubItemIndex < lvitem.SubItems.Count; intLVSubItemIndex++)<br />
  {<br />
    LVSubItem = lvitem.SubItems[intLVSubItemIndex];<br />
    myrect = new RECT();<br />
    myrect.top = intLVSubItemIndex;<br />
    myrect.left = LVIR_BOUNDS;<br />
    intSendMessage = SendMessage(listView1.Handle, LVM_GETSUBITEMRECT, wParam, ref myrect);<br />
    if( e.X < myrect.left)<br />
    {<br />
	LVSubItem = lvitem.SubItems[0];<br />
	intLVSubItemIndex = 0;<br />
	break;<br />
    }<br />
    else if(e.X >= myrect.left && e.X <= myrect.right)<br />
    {<br />
	break;<br />
    }<br />
    else<br />
	LVSubItem = null;<br />
  }<br />
<br />
  if (LVSubItem != null && lvitem != null)<br />
  {<br />
    MessageBox.Show(String.Format("ColumnIndex: {0} {1}", intLVSubItemIndex,<br />
			LVSubItem.Text));<br />
  }<br />
<br />
<br />
}<br />
}<br />

The type or namespace name 'MyContolEvent' could not be found<br />
The type or namespace name 'MyCustomEventArgs' could not be found<br />
The type or namespace name 'SystemEventArgs' could not be found