RasDial回傳值的意義

需要參考
RASERROR.H

#define RASBASE 600
#define SUCCESS 0
#define PENDING                              (RASBASE+0)

#define ERROR_PORT_DISCONNECTED              (RASBASE+19)
/*
* The port is disconnected.%0
*/
#define ERROR_PORT_NOT_AVAILABLE             (RASBASE+33)
/*
* The port is already in use or is not configured for Remote Access dial out.%0
*/

Reference:
http://doc.ddart.net/msdn/header/include/raserror.h.html
http://www.cs.scranton.edu/~beidler/Ada/win32/win32-raserror.html