QextSerialPort add new BaudRate

[simonCpp]

Hey, I want to add the "691200" and "921600" baud rate to the Qextserialport baud rates list.

1. I add the b.r. values to the enum BaudRateType.

2. On the "setBaudRate" function I add this cases:
   @
   /691200 baud/
   case BAUD691200:
   TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: POSIX does not support 691200 baud operation.");
   Win_CommConfig.dcb.BaudRate=CBR_691200;
   break;

       /*921600 baud*/
       case BAUD921600:
            TTY_PORTABILITY_WARNING("Win_QextSerialPort Portability Warning: POSIX does not support 921600 baud operation.");
            Win_CommConfig.dcb.BaudRate=CBR_921600;
            break;
   

@

3. In the "winbase.h" file, I add this definetions.
   @
   #define CBR_691200 691200
   #define CBR_921600 921600
   @

Is this the correct way to do it? and how can I check it?