Params path is a path to the file whose resource types you wish to count.
Action Determines the number of different resource types a file has.
The number of resource types in the file named in path. This verb is only implemented in the Mac OS version of Frontier. This is an advanced Frontier verb of primary interest to implementers and advanced scripters. It is not necessary to understand it to use Frontier effectively for most tasks. Combined with rez.getNthResType you can access all the resource types.