Problem in LL_AddUserToGroup

Richard_Ma_(mtrcadmin_-_(deleted))

Hi,I call LL_AddUserToGroup VB6 code, but return "false"If LL_AddUserToGroup(lngSession, lngUserName, LL_GROUP, lngGroupName) <> LL_OK Then ln_rnt = 1End IfI'm sure that lngSession is correctlngUserName is correctlngGroupName is correctLL_Group = 1, because the use added to a group The UserName is not existed in the groupWhat is the problemBest Regards,Richard