SECURITY_DESCRIPTOR_REVISION
pnhead->revision = SECURITY_DESCRIPTOR_REVISION;
pnhead->revision = SECURITY_DESCRIPTOR_REVISION;
&& (phead->revision == SECURITY_DESCRIPTOR_REVISION)
sd->revision = SECURITY_DESCRIPTOR_REVISION;
pnhead->revision = SECURITY_DESCRIPTOR_REVISION;
targhead->revision = SECURITY_DESCRIPTOR_REVISION;
sd->revision = SECURITY_DESCRIPTOR_REVISION;