On Windows OS, printstatus and sys(13) always return .T. or ON.
You need to test the on error.

local m.lcerror,m.llerror
m.llerror=.F.
m.lcerror=on('error')
on error m.llerror=.T.

* do your test print job here


* restore the old error handle
on error &lcerror
if m.llerror
* printer not ready
else
* printer ready
endif