A rule that permits stacking if two objects share the same symbol ID value.
|IAutoGroupRule||Controls members that are common to all cached graphic grouping rules.|
|IClassID (System)||Provides access to methods identifying class ID.|
|IPersistVariant (System)||Provides access to members used for storage of an object through VARIANTs.|
|IStackingRule||Controls members specific to rules that govern whether two cached graphics should be stacked.|
|IStackSymbolIDRule||Provides an identity interface to StackSymbolIDRule objects.|