Identifies the UI_PKEY_CategoryId property.
propertyDescription name = UI_PKEY_CategoryId shellPKey = UI_PKEY_CategoryId formatID = 00000103-7363-696e-8441798acf5aebb7 propID = 103 typeInfo type = VT_UI4
UI_PKEY_CategoryId is used by an application to query the IDs of the categories that are used to group related items in a gallery control.
The property value is the zero-based index of an item in a category collection.
The following screen shot illustrates the use of categories in a SplitButton menu where Selection shapes has an ID of 0 and Selection options has an ID of 1.