-The message buffer (msg) used to send is the same format as
-used for regular RMR send and reply to sender operations,
-thus any buffer allocated by these means, or calls to
-*rmr_rcv_msg()* can be passed to this function.
+*Vctx* is the RMR void context pointer that was returned by
+the ``rmr_init`` function. The message buffer (msg) used to
+send is the same format as used for regular RMR send and
+reply to sender operations, thus any buffer allocated by
+these means, or calls to *rmr_rcv_msg()* can be passed to
+this function.