// OPCClient_VC_6.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#import "..\..\ufOPCClientToolkit.dll"
class Callback : public ufOPCClientToolkitLib::IufCallback
{
HRESULT __stdcall raw_OnNewData(
/* [in] */ BSTR bstrItemID,
/* [in] */ VARIANT vValue,
/* [in] */ DATE dTime,
/* [in] */ LONG wQuality)
{
printf("Values were retrieved asynchronously!\n");
return S_OK;
}
HRESULT STDMETHODCALLTYPE QueryInterface( REFIID iid, LPVOID* ppInterface)
{
if ( ppInterface == NULL) return E_INVALIDARG;
*ppInterface = NULL;
if ( iid == IID_IUnknown )
{
*ppInterface = dynamic_cast<IUnknown *>(this);
}
else if ( iid == __uuidof (ufOPCClientToolkitLib::IufCallback))
{
*ppInterface = dynamic_cast<ufOPCClientToolkitLib::IufCallback*>(this);
}
else
{
return E_NOINTERFACE;
}
AddRef ();
return S_OK;
}
ULONG STDMETHODCALLTYPE AddRef( void) { return 2; }
ULONG STDMETHODCALLTYPE Release( void) { return 1; }
};
int main(int argc, char* argv[])
{
HRESULT hr;
hr = CoInitializeEx (NULL, COINIT_MULTITHREADED);
CLSID clsid;
Callback callback;
hr = CLSIDFromProgID (L"ufOPCClientToolkit.ufOPCClientHelper", &clsid);
ufOPCClientToolkitLib::IufOPCClientHelper *pHelper;
hr = CoCreateInstance (clsid, NULL, CLSCTX_ALL, __uuidof(ufOPCClientToolkitLib::IufOPCClientHelper)
, (LPVOID*) &pHelper);
hr = pHelper->raw_Connect(_bstr_t(L"uForte.ufOPCDASrvCust"), 2, _bstr_t(L""));
hr = pHelper->raw_SetCallback (&callback);
hr = pHelper->raw_StartReadingItem (_bstr_t(L"Test.ReadWrite.BOOL"));
while (true)
{
// retrieve data synchronously
VARIANT vValue;
DATE dtTime;
LONG usQuality;
hr = pHelper->raw_GetItemValue(_bstr_t(L"Test.ReadWrite.BOOL"), &vValue, &dtTime, &usQuality);
printf("Values were retrieved synchronously!\n");
Sleep (1000);
}
hr = pHelper->raw_Disconnect ();
return 0;
}
Anonymous - 10 months ago