Create com port fail. return 55

ERROR_DEV_NOT_EXIST 55 (0x37)

The specified network resource or device is no longer available.

Reference:

http://msdn.microsoft.com/en-us/library/ms681382(VS.85).aspx

RasDial return 608

RasDial 

This function establishes a RAS connection between a RAS client and a RAS  server. The connection data includes callback and user authentication  information.

RasDial return 608

表示ERROR_DEVICE_DOES_NOT_EXIST 

20100318 update:

狀況1:

與藍芽手機連線

在連線中的狀態下按下取消鍵

會回報619

表示

ERROR_PORT_NOT_OPEN

Reference: http://www.cs.uofs.edu/~beidler/Ada/win32/win32-raserror.html