GetprocAddress not able to locate address

[With_problem]

i am trying to get address of dll function but not able to do that,any idea how to solve it..... it always return null....

SetQuote = (Set_Quote_DB)GetProcAddress(hInstance,"setQuoteToDB");
if(SetQuote != NULL)
{

   MessageBox("set quote is not null");
 	
}	
else
{
	MessageBox("set quote is null");
}

[Hamid Taebi]

Are you sure hInstance is valid ?

---

WhiteSky

---

[With_problem]

yes i think ,see my code....

HINSTANCE hInstance ;

hInstance = AfxLoadLibrary("C:\\ActiveXdll\\WartzODLCOM.dll");
if(hInstance != NULL)
{
//dont go further
MessageBox("load dll");
}
else
{
MessageBox("enable to load dll");
}

//"GetProcAddress" get the address of the functions
SetQuote = (Set_Quote_DB)GetProcAddress(hInstance,"setQuoteToDB");
if(SetQuote != NULL)
{

   MessageBox("set quote is not null");
 	
}	
else
{
	MessageBox("set quote is null");
}

[Hamid Taebi]

Did you use of GetLastError for error information?

---

WhiteSky

---

[With_problem]

no

[Hamid Taebi]

use of this function for see error and also check setQuoteToDB for exports statement on dll

---

WhiteSky

---

[With_problem]

do you have any link,i have never used this function before

[Hamid Taebi]

You dont need any link best explain is on MSDN :)

---

WhiteSky

---

[Hamid Taebi]

Is your problem solving?

---

WhiteSky

---

[With_problem]

No i am still stuck with same problem...do you have any clear idea how to call com dll function....i think my problem is that only....pls if you can help me....

[Hamid Taebi]

Check name function and parameters(input/output) on dll that are same with when you call this file on your application

---

WhiteSky

---

[With_problem]

see i have chkge the code still i am not able to locate my function.....i have tried all my best...pls help me...still it return null...and for function call setquotetodb is....unhandled exeption in apiocx access violation. code here

HRESULT hresult;
CLSID clsid;

CoInitialize(NULL);
hresult=CLSIDFromProgID(OLESTR("WartzODLCOM.DBAccess"),&clsid);
\_DBAccess \*t;
hresult=CoCreateInstance(clsid,NULL,CLSCTX\_INPROC\_SERVER,\_\_uuidof(IDispatch ),(LPVOID \*) &t);

if(FAILED(hresult))
{
AfxMessageBox("Creation Failed");
return;
}

else
{
MessageBox("success");
}

SessID=SessionId;
CurrentRequestId=RequestId;

marketno.Format("%d",MarketNo);
bid\_d.Format("%c",BidDirection);
ask\_d.Format("%c",AskDirection);
marketstate.Format("%d",MarketState);

   m\_MainEdit= SessionId + "\\t" + RequestId +"\\t"+ marketno ; 
m\_MainEdit= Market + Bid  + bid\_d +  Ask +ask\_d High ;
m\_MainEdit=m\_MainEdit + Low  + marketstate   + Timestamp ;

UpdateData(FALSE);
iLineCount=m\_EditCtrl.GetLineCount();
m\_EditCtrl.LineScroll(iLineCount);

if(hresult != NULL)
{
MessageBox("not null");
USES_CONVERSION;
BSTR bsTimeStamp = A2BSTR(Timestamp);
BSTR bsMarket = A2BSTR(Market);
BSTR bsBid = A2BSTR(Bid);
BSTR bsAsk = A2BSTR(Ask);

// SetQuote(&bsTimeStamp,&MarketNo,&bsMarket,&bsAsk,&bsBid,&MarketState);
t->setQuoteToDB(&bsTimeStamp,&MarketNo,&bsMarket,&bsAsk,&bsBid,&MarketState);
SysFreeString(bsTimeStamp);
SysFreeString(bsMarket);
SysFreeString(bsBid);
SysFreeString(bsAsk);
}
else
{
MessageBox("null");
}
// FreeLibrary( hInstance );

CoUninitialize();

return;
}