Identifies the UI_PKEY_ItemsSource property.
propertyDescription name = UI_PKEY_ItemsSource shellPKey = UI_PKEY_ItemsSource formatID = 00000101-7363-696e-8441798acf5aebb7 propID = 101 typeInfo type = IUICollection
UI_PKEY_ItemsSource is used by an application to query the collection of items in a gallery control, such as the Quick Access Toolbar (QAT).
The property value is an IUICollection object.
To add or delete items in a gallery control at run time, use the IUICollection methods.
The following screen shot illustrates a collection of items in a SplitButtonGallery menu.