You don't need the SamplePortal.dll if you create your provider.

Are you familar with the IbuySpy?

This is an example showing how to integrate CuteChat with IbuySpy.

---

PortalUserProvider.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Security.Principal;

namespace CuteChatControls
{
 /// <summary>
 /// Summary description for IbuySpyUserAdapter.
 /// </summary>
 public class IbuySpyUserAdapter : CuteSoft.Chat.UserAdapter
 {
  public override string GetUserUniqueName(System.Web.HttpContext context)
  {
   IIdentity iden=context.User.Identity;

   if(iden==null||!iden.IsAuthenticated)
    return null;
   if(iden.Name==null||iden.Name.Length==0)
    return null;

   return iden.Name;
  }
 }
}

---

PortalDataProvider.cs
 

using System;
using System.Collections;
using System.Data;
using System.Data.SqlClient;
using ASPNetPortal;
using CuteSoft.Chat;

namespace CuteChatControls
{
 /// <summary>
 /// Summary description for IbuySpyDataProvider.
 /// </summary>
 public class IbuySpyDataProvider : CuteSoft.Chat.DataProvider
 {
  public override string GetUserDisplayName(string useruniquename)
  {
   return useruniquename;
  }
  public override string[] ListUserUniqueName()
  {
   // Get the list of registered users from the database
   AdminDB admin = new AdminDB();

   SqlDataReader reader = admin.GetUsers();

   ArrayList result = new ArrayList();
   while(reader.Read())
   {
    result.Add(reader.GetString(0));
   }
  
   return (String[]) result.ToArray(typeof(String));

  }
  public override bool IsAdministrator(string useruniquename)
  {
   String[] roles;
   UsersDB user = new UsersDB();
   roles = user.GetRoles(useruniquename);

   foreach (String role in roles)
   {           
    if (role.ToLower()=="admins")
    {
     return true;
    }
   }
   return false;
  }

  public override string[] SearchUserUniqueNameByDisplayName(string userDisplaName)
  {
   if(userDisplaName==null||userDisplaName=="")return new string[0];
   userDisplaName = userDisplaName.ToLower();

   AdminDB admin = new AdminDB();

   SqlDataReader reader = admin.GetUsers();

   ArrayList names = new ArrayList();
   while(reader.Read())
   {
    try
    {
     string val= reader.GetString(1);
     if(val.ToLower().IndexOf(userDisplaName)!=-1)
      names.Add(val);
    }
    catch{}
    
   }
   
   return (string[])names.ToArray(typeof(string)); 
  }
 }
}