The baud rate has been set
Parameters passed to GPSNOTIFYPROC:
lParam1
The baud rate set for the current communications port.
lParam2
A pointer to a NULL-terminated text status message: "Baud rate set to <n> bps" (where <n> is the baud rate). On Windows CE platforms this will be a Unicode buffer; on all other platforms it is an ASCII buffer.
lParam3
Contains the user-defined parameter lUserParam that was passed to the
GpsSetNotificationCallback function.