INT 7C - SK-UPPS Data Link Interface 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. - CLIENT HOOK AX = 0010h Return: nothing Notes: An application having no active protocols may call this function to prevent the DLI from unloading. SeeAlso: AX=0001h,AX=0011h