Receive a directed message

typedef struct vx_evt_user_to_user_message{    /**    * The common properties for all events.    */    vx_evt_base_t base;    /**    * Handle returned from successful Account Login request.    * \see vx_req_account_anonymous_login    */    VX_HANDLE account_handle;    /**    * URI of the account sending the message.    */    char *from_uri;    /**    * The encoded URI for the sending user with the tag.    * This uniquely identifies users that might be signed in with the same account name from multiple devices (Multi-Login).    */    char *encoded_uri_with_tag;    /**    * The content of the message being received, UTF-8 encoded.    */    char *message_body;    /**    * The language (default NULL, implies "en").    */    char *language;    /**    * Namespace of the custom application stanza (optional, default NULL).    */    char *application_stanza_namespace;    /**    * Custom application stanza body (optional, default NULL).    */    char *application_stanza_body;    /**    * The displayname if the from_uri had a displayname    */    char *from_displayname;}vx_evt_user_to_user_message_t;