You can specify the amount of vertical space, in pels, to allow between container items by using the cyLineSpacing field of the CNRINFO data structure. If you do not specify how much vertical space can be used, the container control sets the space between the items using a default value. For the Tree view, you can specify the horizontal distance between the levels by using the cxTreeIndent field of the CNRINFO data structure. If this value is less than 0, a default is used.