Hi Martin, I haven't tried the patch yet, but from Lawson's trace it looks like the completion routine for ReadFileEx is not being called. Some notes: * the 16bit Comm code expects ReadFileEx to be unconditionally overlapped, and always call the completion function when the operation completes. * the completion function starts another ReadFileEx, and sends a WM_COMMNOTIFY message to the 16bit app. i had a look at you patch, but i haven't applied it yet, so it's difficult for me to see any problems... i'll have a go later today. Mike Original message from: lawson_whitney@juno.com > >On Thu, 10 Jan 2002, Martin Wilck wrote: .. >> I cannot test the serial comm code and must kindly ask somebody else >> to try that. >> >> Martin >> >> >It doesn't bother my 32 bit app, but the 16 bit app is unable to >initialize the modem. +comm,+file trace attached. > >Lawson ------------------------------------------ mailto:Mike_McCormack@start.com.au ph +82 16 430 0425 __________________________________________________________________ Get your free Australian email account at http://www.Looksmart.com.au