Member name	Value	Description
SFGAO_NONE	0	No attribute is defined.
SFGAO_CANCOPY	1	The specified items can be copied.
SFGAO_CANMOVE	2	The specified items can be moved.
SFGAO_CANLINK	4	Shortcuts can be created for the specified items. This attribute has the same value as DROPEFFECT_LINK. If a namespace extension returns this attribute, a Create Shortcut entry with a default handler is added to the shortcut menu that is displayed during drag-and-drop operations. The extension can also implement its own handler for the link verb in place of the default. If the extension does so, it is responsible for creating the shortcut. A Create Shortcut item is also added to the Windows Explorer File menu and to normal shortcut menus.
SFGAO_STORAGE	8	The specified items can be bound to an IStorage object through IShellFolder::BindToObject.
SFGAO_CANRENAME	16	The specified items can be renamed. Note that this value is essentially a suggestion; not all namespace clients allow items to be renamed. However, those that do must have this attribute set.
SFGAO_CANDELETE	32	The specified items can be deleted.
SFGAO_HASPROPSHEET	64	The specified items have property sheets.
SFGAO_DROPTARGET	256	The specified items are drop targets.
SFGAO_PLACEHOLDER	2048	The specified items are not fully present and recalled on open or access
SFGAO_SYSTEM	4096	Windows 7 and later. The specified items are system items.
SFGAO_ENCRYPTED	8192	The specified items are encrypted and might require special presentation.
SFGAO_ISSLOW	16384	Accessing the item (through IStream or other storage interfaces) is expected to be a slow operation. Applications should avoid accessing items flagged with SFGAO_ISSLOW.
SFGAO_GHOSTED	32768	The specified items are shown as dimmed and unavailable to the user.
SFGAO_LINK	65536	The specified items are shortcuts.
SFGAO_SHARE	131072	The specified objects are shared.
SFGAO_READONLY	262144	The specified items are read-only. In the case of folders, this means that new items cannot be created in those folders. This should not be confused with the behavior specified by the FILE_ATTRIBUTE_READONLY flag. FILE_ATTRIBUTE_READONLY has no meaning for Win32 file system folders.
SFGAO_HIDDEN	524288	The item is hidden and should not be displayed unless the Show hidden files and folders option is enabled in Folder Settings.
SFGAO_FILESYSANCESTOR	268435456	The specified folders are either file system folders or contain at least one descendant (child, grandchild, or later) that is a file system (SFGAO_FILESYSTEM) folder.
SFGAO_FOLDER	536870912	The specified items are folders. Some items can be flagged with both SFGAO_STREAM and SFGAO_FOLDER, such as a compressed file with a .zip file name extension. Some applications might include this flag when testing for items that are both files and containers.
SFGAO_FILESYSTEM	1073741824	The specified folders or files are part of the file system (that is, they are files, directories, or root directories). The parsed names of the items can be assumed to be valid Win32 file system paths. These paths can be either UNC or drive-letter based.
SFGAO_HASSUBFOLDER	-2147483648	The specified folders have subfolders. The SFGAO_HASSUBFOLDER attribute is only advisory and might be returned by Shell folder implementations even if they do not contain subfolders. Note, however, that the converse—failing to return SFGAO_HASSUBFOLDER—definitively states that the folder objects do not have subfolders. Returning SFGAO_HASSUBFOLDER is recommended whenever a significant amount of time is required to determine whether any subfolders exist. For example, the Shell always returns SFGAO_HASSUBFOLDER when a folder is located on a network drive.
SFGAO_VALIDATE	16777216	When specified as input, SFGAO_VALIDATE instructs the folder to validate that the items contained in a folder or Shell item array exist.
SFGAO_REMOVABLE	33554432	The specified items are on removable media or are themselves removable devices.
SFGAO_COMPRESSED	67108864	The specified items are compressed.
SFGAO_BROWSABLE	134217728	The specified items can be hosted inside a web browser or Windows Explorer frame.
SFGAO_NONENUMERATED	1048576	The items are nonenumerated items and should be hidden.
SFGAO_NEWCONTENT	2097152	The items contain new content, as defined by the particular application.
SFGAO_STREAM	4194304	Indicates that the item has a stream associated with it.
SFGAO_STORAGEANCESTOR	8388608	Children of this item are accessible through IStream or IStorage. Those children are flagged with SFGAO_STORAGE or SFGAO_STREAM.

Reference

ShellBoost.Core.WindowsShell Namespace