@PID[filename[,+]] : Returns the PID for specified name (or 0 if no match). If you have multiple copies of the same executable running, @PID will return the first one it finds.
If you specify the optional second argument +, @PID will return all PID's that match the first argument.
@pid[firefox,+]
See also: @PPID, @PIDCOMMAND, @PIDUSER.
Example:
echo %@pid[tcc.exe]
22420
echo %@pid[firefox.exe,+]
11317 9466 12440
