Calculates the spacing between items in the current list-view control.
View for which to retrieve the item spacing. Specify true for small icon view, or false for icon view.
Contains the horizontal spacing between items.
Contains the vertical spacing between items.
true if this method is successful; otherwise, false.
This method sends the LVM_GETITEMSPACING message, which is described in the Windows SDK.
This method is supported in Windows NT 3.51 and later.