INT 2F - License Service 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. - QUERY LICENSE AX = 7005h CX = license server index (0000h to 001Fh) DS:DX -> SLSQUERY structure (see #02855) ES:BX = provider specific handle for the license context Return: AL = status 00h not installed FFh installed SeeAlso: AX=7001h,AX=7002h Format of License Service SLSQUERY structure: Offset Size Description (Table 02855) 00h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (ret) status code 04h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. handle identifying license context 08h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. information index 0Ch DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. buffer size in bytes 10h N BYTEs data buffer