Specifies the intercharacter spacing for the human readable text, in modules.
property TextCSpacing: Integer;
It's the amount of extra space, in modules, to be added to each character in the human readable text. This property is useful only when the DisplayText property isn't set to dtNone, and the TextAlignment property is set to taLeft, taCenter, taRight, taLeftQuietZone, taCenterQuietZone, or taRightQuietZone. See diagram: