Unable to specify a log file when running pg_ctl as a windows service?

I tried posting this to pgsql-hackers-win32 originally but for some reason
it hasn't gone through, so I am reposting it to pgsql-bugs (though it may
not be a bug but rather a missing feature):

Hello,

I am running Postgresql-8.0.0beta4 and would like to know if there is any
recommended way of specifying a log file for postmaster output when
running pg_ctl.exe as a service? The "-l" option does not seem to work.

Thanks in advance.

Steve McWilliams