I've defined the following function to determine the Users that haven't been assigned to a Project.

The function browses the Add_a_New_User table for all Users and verifies if each User is contained in the Assign_Project table.  If so, the User_Name is added to userList.

2. list lookup.Unassigned_Users()
3. {
4.     userList = List();
5.     for each rec in Add_a_New_User  [ID != 0]
6.     {
7.         if (count(Assign_Project[User == rec.User_Name])  <=  0)
8.         {
9.             userList.add(rec.User_Name);
10.         }
11.     }
12.     return userList;
13. }

I've been trying to define the criteria a View that would contain only the users found and added to the userList.

Does anybody have an idea how this can be achieved?