Gets the size, in pixels, of the grid square used to arrange icons in a large-icon view.
Returns
A size that specifies the dimensions, in pixels, of the grid square used to arrange icons in a large-icon view.
Remarks
The icon_spacing_size property indicates the size of the grid rectangle that each icon fits into when the system arranges them in a large-icon view. This value is always greater than or equal to icon_size.