RBIL61 - DESQview/TopView and Quarterdeck Programs

CALL xxxxh:xxxxh - DESQview XDIsee External Device Interface - Driver API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes.