CTL_CODE          161 TSRM/tsrm_virtual_cwd.c #undef CTL_CODE
CTL_CODE          163 TSRM/tsrm_virtual_cwd.c #define CTL_CODE(DeviceType,Function,Method,Access) (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method))