[Bug 42882] HDX server software: rs232 port access not working

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=42882

--- Comment #19 from Gregory McGill  ---
according to the author:

Opening a COM port in Windows is pretty standard and I use this in a lot of
programs:

wsprintf(ComPortName,"\\.\COM%u", ComPort);
    hSerCom = CreateFile(ComPortName, GENERIC_READ|GENERIC_WRITE, 0, 0, 
                                OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);

If this fails you get some messagebox: Can't open serial port <COM%u:>

or: Can't create overlapped handle for <COM%u:>

If you don't see this then the CreateFile function succeeded.

no error messages in the program