Specifies the horizontal spacing (in pixels) between adjacent columns of list view items for list-based list view controls (i.e., where the VIEW-MODE attribute is set to VM-LIST), or the horizontal indentation of a tree view control's items relative to their respective parent. A value of zero is interpreted as "unspecified", implying that the control's default spacing is used.

Note that the spcified value is automatically scaled on control creation, if necessary, if the parent dialog's AUTO-ADJUST attribute is set to TRUE.

For more information, please refer to the articles Working with List View Controls and Working with Tree View Controls.

Applies to	List view control, tree view control.
Data Type	I4
Default Value	0
Possible Values	0 - 9999