Stretch the image to exactly the height or width of the monitor without changing its aspect ratio or cropping the image. This can result in colored letterbox bars on either side or on above and below of the image. This is equivalent to the WPSTYLE_KEEPASPECT style in IActiveDesktop.
Stretch the image to fill the screen, cropping the image as necessary to avoid letterbox bars. This is equivalent to the WPSTYLE_CROPTOFIT style in IActiveDesktop.
Spans a single image across all monitors attached to the system. This flag has no IActiveDesktop equivalent.