A method, computer program product, and data processing system for facilitating the traversal of a hierarchy of GUI components containing components and/or containers from disparate GUI toolkits is disclosed. In a preferred embodiment, auxiliary associative data structures relating parent components in one toolkit to children in another toolkit are defined. When examining a component to determine if it has children, an appropriate associative data structure is consulted to determine if that component has a child from a disparate toolkit. In accordance with this preferred embodiment, additional associative data structures are defined, which also record the reverse "child-parent" relationship, so as to allow the GUI component tree to be traversed in both directions.