This set has an example DELMSG2.PMM & DELMSG2.PRO
Setup to delete all messages that is on the system 
that are flagged as PRIVATE and has been RECIEVED.

DELMSG2.PMM is the "Match" file in WCPro! for Messages.
DELMSG2.PRO is the "Command" file in WCPro!

Your batch file for an event might look something like

WCPRO DELMSG2

which will use the DELMSG2.PRO command file which in turn 
will use the PMM file for the match.