\wxheading{Parameters}
\docparam{cmd}{The command to execute, including optional arguments.}
-\docparam{flags}{The flags to pass to \helpref{wxExecute}{wxexecute}.}
+\docparam{flags}{The flags to pass to \helpref{wxExecute}{wxexecute}.
+ NOTE: wxEXEC_SYNC should not be used.}
\wxheading{Return value}