There is Client to describe the connection to a WS-Man server, Actions you can run (like Get, Put, Enumerate, ...) and ClientOptions to pass action parameters.

The type describing the Client is WsManClient

The type describing ClientOption is client_opt_t

Actions are function calls operating on WsManClient, client_opt_i and a Resource URI (char *)

All such functions start with wsmc_action_.

If a wsmc_action_* function returns NULL, then the client connection failed (i.e. client not responding, authentication failure, etc.). You can then use wsmc_get_fault_string(), wsmc_get_last_error() and wsmc_get_response_code() to get more details about the client state.

wsmc_get_last_error() gives you a CURL error code while wsmc_get_response_code() gives a HTTP status code(i.e. 401 for unauthorized).

If you get a non-NULL response from wsmc_action_*, then client connection could be established. Then you still need to wsmc_check_for_fault(WsXmlDocH response) to check for server errors.