dOPCComn.TdOPCClient.SetParam

With is method you can set a special connection parameter for UA or XML connections.

Delphi

procedure SetParam(Param: string; Value: string);

C++

__fastcall SetParam(AnsiString Param, AnsiString Value);

Example

 if cLoginMode.ItemIndex > 0 then // if you want authentication (user or certificate)
  begin
    dOPCDAClient1.SetParam('ua-usermode', cLoginMode.ItemIndex.ToString);
    dOPCDAClient1.SetParam('ua-user', eUser.Text); // user name
    dOPCDAClient1.SetParam('ua-pass', ePass.Text); // user password
  end;