Erector Set for Data Form - Version 3.0 Interdependent controls for extra RAD of intelligent end-user interface for database applications. The controls of ESDF can be linked one with another in pre-definite ways. When linked together during design-time, these controls play in run-t ime like one team. The small amount of ESDF controls allows one to link unlimited numbers of data forms with different structures. The operation of linking demands much less time than the writing of glue code for conventional controls. Special requirements: For use with VB5 only.