Registry key: HKEY_CURRENT_USER\Control Panel\Desktop
Parameter: Wallpaper
Type: string
Description:
This key contains full path to wallpaper file. Use the same key at "HKEY_USERS\.DEFAULT\" hive to set this option for all new users.


Registry key: HKEY_CURRENT_USER\Control Panel\Desktop
Parameter: TileWallpaper
Type: string
Description:
To tile wallpaper set this value to 1. Use the same key at "HKEY_USERS\.DEFAULT\" hive to set this option for all new users.


Registry key: HKEY_CURRENT_USER\Control Panel\Desktop
Parameter: WallPaperStyle
Type: string
Description:
To center wallpaper set this value to 0. 1- multiple pictures on desktop; 2 - stretch the wallpaper to fit the desktop. Other values - no wallpaper. Default is "0".


Registry key: HKEY_CURRENT_USER\Control Panel\Desktop
Parameter: Wallpaperoriginy
Type: string
Description:
This key contains the vertical offset of wallpaper. It is the offset from the center of Desktop, so it can be any positive and negative values.


Registry key: HKEY_CURRENT_USER\Control Panel\Desktop
Parameter: Wallpaperoriginx
Type: string
Description:
This key contains the horizontal offset of wallpaper. It is the offset from the center of Desktop, so it can be any positive and negative values.