$iLine_FirstCharIdx = _GUICtrlEdit_LineIndex( $hEdit )
$iLine_Index = _GUICtrlEdit_LineFromChar( $hEdit, $iLine_FirstCharIdx )
$iLine_Length = _GUICtrlEdit_LineLength( $hEdit, $iLine_Index )
_GUICtrlEdit_SetSel( $hEdit, $iLine_FirstCharIdx, $iLine_FirstCharIdx + $iLine_Length )