自定义SC_Error_Code Siebel CTI 2015

Question

我需要在为 Siebel CTI 创建自定义驱动程序时注册自定义错误代码。根据其文档，预定义了以下错误（来自scapi.h的枚举）：

enum SCErrorCode
{
    SC_EC_OK = 0,
    SC_EC_ERROR = 1,
    SC_EC_CMD_NOT_SUPPORTED = 2,
    SC_EC_MEDIA_TYPE_NOT_SUPPORTED = 3,
    SC_EC_INVALID_HANDLE = 4,
    SC_EC_OUT_OF_MEMORY = 5,
    SC_EC_NETWORK_ERROR = 6,
    SC_EC_LIB_LOAD_ERR = 7,     /* Unable to load driver DLL          */
    SC_EC_FUNC_NOT_RESOLVED = 8,     /* Unable to resolve function address */
    SC_EC_DRIVER_CREATION_ERR = 9,
    SC_EC_DRIVER_RELEASE_ERR = 10,
    SC_EC_SERVICE_CREATION_ERR = 11,
    SC_EC_SERVICE_RELEASE_ERR = 12,
    SC_EC_INVALID_ITEM_TRACKING_ID = 13,
    SC_EC_CLIENT_INTERFACE_ERR = 14,    /* Failed on invoking ISC_CLIENT_HANDLE function       */
    SC_EC_SENDMSG_FAILED_RETRY = 15,    /* SC_CT_SENDMESSAGE failed,  please resend again later  */
    SC_EC_IMPOBJ_CREATE_ERR = 16,    /* Unable to create the underlying implementation object */
    SC_EC_INVALID_LICENSE = 17,
    SC_EC_WORK_ITEM_WRONG_STATE = 18,    /* Work item is at wrong state for the operation         */
    SC_EC_DRIVER_SPECIFIC = 1000
};

Siebel管理指南page 270说：

SCErrorCode： SCErrorCode枚举的值指定预定义的错误代码。保留0到1000的错误代码。

如何添加/注册自定义错误代码？或者有没有办法使用SC_EC_DRIVER_SPECIFIC错误指定驱动程序特定的错误消息。