bp_get_messages_username_value()

	function bp_get_messages_username_value() {
		if ( isset( $_COOKIE['bp_messages_send_to'] ) ) {

			/**
			 * Filters the default username for the recipient box.
			 *
			 * Value passed into filter is dependent on if the 'bp_messages_send_to'
			 * cookie or 'r' $_GET parameter is set.
			 *
			 * @since BuddyPress 1.0.0
			 *
			 * @param string $value Default user name.
			 */
			return apply_filters( 'bp_get_messages_username_value', $_COOKIE['bp_messages_send_to'] );
		} elseif ( isset( $_GET['r'] ) && !isset( $_COOKIE['bp_messages_send_to'] ) ) {
			/** This filter is documented in bp-messages-template.php */
			return apply_filters( 'bp_get_messages_username_value', $_GET['r'] );
		}
	}