send_message method.
Before sending the message is necessary to build an openmaia::message object that will be passed to send_message method.
Here is an example of how to send a message with two parameters.
...
// assume my_connector points to an instance of openmaia::connector
//already connected to the server
// create the message
openmaia::message my_message;
my_message.set_command("TEST");
my_message.add_parameter("PARAMETER1");
my_message.add_parameter("PARAMETER2");
// send the message
my_connector->send_message(my_message);