Best practice to select and copy a file to a remote location?

[matleeds]

I have a requirement where when a button is clicked the app connects to a remote pc and the user can browse to a folder on the c drive then copy a file to their pc (not on a LAN but a remote location)

When using Remote desktop connection the details are (for example)
Computer: abcd.dyndns.org:1234
Username: bob2\apple
Password: password

After doing a bit of research using WMI or Impersonation seems the best options. Here's where I'm at with the Impersonation approach..

[DllImport("advapi32.DLL", SetLastError=true)]
        public static extern int LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType,
            int dwLogonProvider, ref IntPtr phToken);

private void button4_Click(object sender, EventArgs e)
        {
            WindowsIdentity wid_current = WindowsIdentity.GetCurrent();
            WindowsImpersonationContext wic = null;
            try
            {
                IntPtr admin_token = new IntPtr();
               
                if (LogonUser("bob2\apple", "abcd.dyndns.org:1234","password",9, 0, ref admin_token) != 0)
                {   
                    wic = new WindowsIdentity(admin_token).Impersonate();

                    // NOT SURE ABOUT THIS BIT.....
                    File.Copy(@"", @"",
                        true);
                    MessageBox.Show("Copy Succeeded");
                }
                else
                {
                    MessageBox.Show("Copy Failed");
                }
             }
            catch(Exception se)
            {
                int ret = Marshal.GetLastWin32Error();
                MessageBox.Show(ret.ToString(), "Error code: " + ret.ToString());
                MessageBox.Show(se.Message);
            }
            finally
            {
                if (wic != null)
                    wic.Undo();
            }
           
        }

thanks,