//Call advapi32!InitializeSecurityDescriptor()

static extern bool InitializeSecurityDescriptor(out SECURITY_DESCRIPTOR SecurityDescriptor, uint dwRevision);

Private Shared Function InitializeSecurityDescriptor(ByRef SecurityDescriptor As SECURITY_DESCRIPTOR, dwRevision As UInteger) As Boolean

InitializeSecurityDescriptor(out securityDesc, 1);

InitializeSecurityDescriptor(out securityDesc, 1);

        public static extern bool InitializeSecurityDescriptor(out SECURITY_DESCRIPTOR securityDescriptor, uint dwRevision);

                    worked = Native.InitializeSecurityDescriptor( out securityDesc, SdRevisionLevel );