Hallo Christian,
die Funktion ist vom VirtualTree geerbt:
TBaseVirtualTree.FullExpand();
Beachte aber:
Zitat:
Call this method to bring all nodes in the tree into an expanded state. This method expands every node in the tree and initializes nodes which are not yet initialized to expand them too if necessary. Since this will validate every node in the tree it is counterproductive and against the Virtual Paradigm.