I did a test that seems to confirm Ray's point in #66 -- that is, that it if the application calls SetErrorMode(1) the pop-up will be off for the whole application including for any threads started by the application.
I did a test that seems to confirm Ray's point in #66 -- that is, that it if the application calls SetErrorMode(1) the pop-up will be off for the whole application including for any threads started by the application.