CyAPI объясните как прописывать endpoint

CCyUSBDevice *USBDevice = new CCyUSBDevice(NULL);
 OVERLAPPED outOvLap, inOvLap;
 outOvLap.hEvent = CreateEvent(NULL, false, false, "CYUSB_OUT");
 inOvLap.hEvent = CreateEvent(NULL, false, false, "CYUSB_IN");
 unsigned char inBuf[128];
 ZeroMemory(inBuf, 128);
 unsigned char buffer[128] = "1s";//(unsigned char*)Form1->Edit1->Text.c_str();
 LONG length = 128;
 // Just to be cute, request the return data before initiating the loopback
 UCHAR *inContext = USBDevice->BulkInEndPt->BeginDataXfer(inBuf, length, &inOvLap);
 UCHAR *outContext = USBDevice->BulkOutEndPt->BeginDataXfer(buffer, length, &outOvLap);
 USBDevice->BulkOutEndPt->WaitForXfer(&outOvLap,100);
 USBDevice->BulkInEndPt->WaitForXfer(&inOvLap,100);
 USBDevice->BulkOutEndPt->FinishDataXfer(buffer, length, &outOvLap,outContext);
 USBDevice->BulkInEndPt->FinishDataXfer(inBuf, length, &inOvLap,inContext);
 CloseHandle(outOvLap.hEvent);
 CloseHandle(inOvLap.hEvent);
 Memo2->Lines->Add(AnsiString((char *)inBuf));

 UCHAR *outContext = USBDevice->BulkOutEndPt->BeginDataXfer(buffer, length, &outOvLap);
 USBDevice->BulkOutEndPt->WaitForXfer(&outOvLap,100);
 USBDevice->BulkOutEndPt->FinishDataXfer(buffer, length, &outOvLap,outContext);