Hello,

In attached code i need to set this to read from OPC servers cache and not directly from the device. I just can't get the syntax on this line. Can someone help me?

#include "stdafx.h"
#include <atlsafe.h>
#include <comutil.h>
#include <iostream>


using namespace std;

#import "libid:BED7F4EA-1A96-11D2-8F08-00A0C9A6186D" // mscorlib
using namespace mscorlib;

#import "libid:ecf2e77d-3a90-4fb8-b0e2-f529f0cae9c9" // OpcLabs.BaseLib
using namespace OpcLabs_BaseLib;

#import "libid:14D1A788-0333-4D64-8547-8FB0357408EF" // OpcLabs.EasyOpcClassicInternal
using namespace OpcLabs_EasyOpcClassicInternal;

#import "libid:1F165598-2F77-41C8-A9F9-EAF00C943F9F" // OpcLabs.EasyOpcClassic
using namespace OpcLabs_EasyOpcClassic;




int _tmain(int argc, _TCHAR* argv[])
{

bool exit = false;

while (exit == false)
{
// Initialize the COM library
CoInitialize(NULL);

// Instatiate the EasyOPC-DA client object
_EasyDAClientPtr ClientPtr(__uuidof(EasyDAClient));

_DAReadItemArgumentsPtr ReadItemArguments1Ptr(_uuidof(DAReadItemArguments));
ReadItemArguments1Ptr->ServerDescriptor->MachineName = L"";
ReadItemArguments1Ptr->ServerDescriptor->ServerClass = L"Kepware.KEPServerEx.V5";
ReadItemArguments1Ptr->ItemDescriptor->ItemId = L"Simulation Examples.Functions.Ramp2";
//ReadItemArguments1Ptr->DAReadParameters->DADataSource = 1;
//THIS WON't WORK

---

ReadItemArguments1Ptr->ReadParameters->DataSource = 1;
//************************************************************************************************
CComSafeArray<VARIANT> ArgumentsArray(1);
ArgumentsArray.SetAt(0, _variant_t((IDispatch*)ReadItemArguments1Ptr));


LPSAFEARRAY pArgumentsArray = ArgumentsArray.Detach();
CComSafeArray<VARIANT> ResultArray(ClientPtr->ReadMultipleItems(&pArgumentsArray));
ArgumentsArray.Attach(pArgumentsArray);

for (int i = ResultArray.GetLowerBound(0); i <= ResultArray.GetUpperBound(0); i++)
{
_DAVtqResultPtr DAVtqResultPtr(ResultArray);
_DAVtqPtr DAVtqPtr(DAVtqResultPtr->Vtq);





variant_t res = DAVtqPtr->Value;
cout << res.fltVal;
cout << endl;
}

// Release all interface pointers BEFORE calling CoUninitialize()
ResultArray.Destroy();
ClientPtr = NULL;

CoUninitialize();


Sleep(1000);
}
return 0;
}