Die Suchmaschine meines Vertrauens lieferte mir folgendes:
Zitat:
Remarks
The SetCommState function uses a DCB structure to specify the desired configuration. The GetCommState function returns the current configuration.
To set only a few members of the DCB structure, you should modify a DCB structure that has been filled in by a call to GetCommState. This ensures that the other members of the DCB structure have appropriate values.
The SetCommState function fails if the XonChar member of the DCB structure is equal to the XoffChar member.
When SetCommState is used to configure the 8250, the following restrictions apply to the values for the DCB structure's ByteSize and StopBits members:
The number of data bits must be 5 to 8 bits.
näheres findest Du
hier
Gruß
K-H