Adding headers to C++ call to C# webservice

[Q]

I created a webservice in c# that has a header that must be past to
authenticate the calling program. I have like 7 webmethods that use
this soap header. when I create a app in C++ that calls this service
the proxy class created from the wsdl as autheticationheader0-6
declaired. how do I add the header in c++ for the C# webservice call?
I am also getting a memory error after the webservice call.