My program needs to read and write to folders on other machines that might be in another domain. So I used the System.Runtime.InteropServices to add shared folders. This worked fine when it was hard coded in the main menu of my windows service. But since then something went wrong and I don't know if it is a coding error or configuration error.

• What is the scope of a shared folder? If a thread in my program adds a shared folder, can the entire local machine see it?

• Is there a way to view what shared folders has been added? Or is there a way to see when a folder is added?

  [DllImport("NetApi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
  internal static extern System.UInt32 NetUseAdd(string UncServerName, int Level, ref USE_INFO_2 Buf, out uint ParmError);
  
  [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
  internal struct USE_INFO_2
  {
      internal LPWSTR ui2_local;
      internal LPWSTR ui2_remote;
      internal LPWSTR ui2_password;
      internal DWORD ui2_status;
      internal DWORD ui2_asg_type;
      internal DWORD ui2_refcount;
      internal DWORD ui2_usecount;
      internal LPWSTR ui2_username;
      internal LPWSTR ui2_domainname;
  }
  
  private void AddSharedFolder(string name, string domain, string username, string password)
  {
      if (name == null || domain == null || username == null || password == null)
          return;
  
      USE_INFO_2 useInfo = new USE_INFO_2();
      useInfo.ui2_remote = name;
      useInfo.ui2_password = password;
      useInfo.ui2_asg_type = 0;    //disk drive
      useInfo.ui2_usecount = 1;
      useInfo.ui2_username = username;
      useInfo.ui2_domainname = domain;
      uint paramErrorIndex;
      uint returnCode = NetUseAdd(String.Empty, 2, ref useInfo, out paramErrorIndex);
      if (returnCode != 0)
      {
          throw new Win32Exception((int)returnCode);
      }
  }