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How can I make the login part in QuickFIX in c++? I found tons of tutorials and articles on how to do this on c# or java, but nothing on c++. I have a server (acceptor), and a client (initiator). The username and password of the client are stored in the settings file, and are hardcoded in the server program. From what I've read in the client I set the username and password in fromAdmin() and read and check the in the server in the toAdmin() , but how do I do that? Here's what I've tried so far: cast the message to a FIX44::Logon& object using: FIX44::Logon& logon_message = dynamic_cast<FIX44::Logon&>(message); Set the Username and password to the logon object like this: if(session_settings.has("Username")) { FIX::Username username = session_settings.getString("Username"); logon_message.set(username); } And send the message like this: FIX::Message messageToSend = logon_message; FIX::Session::sendToTarget(messageToSend); But I get this error on the cast: cannot dynamic_cast 'message' (of type 'class FIX::Message') to type 'struct FIX44::Logon&' (target is not pointer or reference to complete type) What I've tried I got inspired from http://niki.code-karma.com/2011/01/quickfix-logon-support-for-username-password/comment-page-1/ . I'm still not clear on how to make the client and the server. Can anyone help me?

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