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工作状态巡检参数结构体。
struct{
DWORD dwTimeout;
DEV_WORK_STATE_CB fnStateCB;
void *pUserData;
BYTE byRes[60];
}NET_DVR_CHECK_DEV_STATE,*LPNET_DVR_CHECK_DEV_STATE;
typedef BOOL (CALLBACK *DEV_WORK_STATE_CB)( void *pUserdata, LONG lUserID, LPNET_DVR_WORKSTATE_V40 lpWorkState );
NET_DVR_StartGetDevState NET_DVR_Login_V40