int __stdcall Ex_ReadData(int pipenum,unsigned char *recbuffer,int len,int waittime=-1);
int __stdcall Ex_WriteData(int pipenum,unsigned char *sendbuffer,int len,int waittime=-1);
int __stdcall Ex_Vender_ScanOrPrint(unsigned char code,int length);
int __stdcall Ex_Vender_E2prom(unsigned char code,unsigned char offset,int length);
int __stdcall Ex_Vender_Read(unsigned char &version);