MOSS07权限分配问题！

           我们大家都直到，在ＳＰＳ０３和０７里面　变化比较大的问题就是权限问题，
下面就是我操作０７的权限分配代码，希望对各位开发人员有帮助
   　　　SPWeb web = (new SPSite("http://moss/sites/hello/subweb")).OpenWeb();
                SPRoleDefinition newRole = new SPRoleDefinition();
                newRole.Name = "My Role";
                newRole.Description = "Role to view list items and pages.";
                newRole.BasePermissions = SPBasePermissions.ViewListItems | SPBasePermissions.ViewPages;
                if (!web.HasUniqueRoleDefinitions)
                    web.RoleDefinitions.BreakInheritance(true, true);
                web.RoleDefinitions.Add(newRole);

                SPList list = web.Lists["֪ͨ"];
                if (!list.HasUniqueRoleAssignments)
                    list.BreakRoleInheritance(true);
                SPRoleAssignment assignment = new SPRoleAssignment(web.EnsureUser("lhvm\wanghao")
                assignment.RoleDefinitionBindings.Add(web.RoleDefinitions["My Role"]);
                list.RoleAssignments.Add(assignment);