| SpaceW Property | Returns or sets the optimal width of the movable spaces. | 
| HasSpaceW Method | Returns true if the SpaceW property has a value. | 
| MinSpaceW Property | Returns or sets the minimum width of the movable spaces. | 
| HasMinSpaceW Method | Returns true if the MinSpaceW property has a value. | 
| MaxSpaceW Property | Returns or sets the maximum width of the movable spaces. | 
| HasMaxSpaceW Method | Returns true if the MaxSpaceW property has a value. |