src\xwpsec_ring0 has the code for the ring-0 part of the XWorkplace Installable Security Subsystem (ISS). This is an SES base device driver. Aside from some 16-bit thunking code written in assembler, it is a 32-bit device driver, and can be compiled using VAC 3.08. IBM ALP is needed for the assembler files. I now force ALP into MASM 5.10 compatibility mode, so this should work with newer ALPs as well (V1.0.1 (2003-01-07) [umoeller]). All this code compiles into the XWPSEC32.SYS driver file, which forms the ring-0 part of XWorkplace Security. See strat_init_base.c for an introduction. Ulrich M”ller (2000-11-28)