CALL xxxxh:xxxxh - QEXT.SYS Private 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.
InstallCheck:	see INT 15/AX=11DEh
SeeAlso: INT 15/AX=11DEh