Can't make any TCP/IP connection from my ActiveX

[43214007]

This is puzzling my now for quite some time now. I can't seem to make any TCP/IP connection from my ActiveX component using the CAsyncSocket class. Somehow the CAsynSocket::Create() returns FALSE but I don't know why.

Even when I create a fresh new ActiveX component and add this code I can't even to create the socket.

CAsyncSocket Socket;
Socket.Create(); <- Returns false !?!?!?

Why does the Create() function fail when I use it from an ActiveX component?

This same code sure works when I use it from a .exe file.

 

[obislavu]

Try to construct the object from the heap instead on the stack e.g. try:

CAsyncSocket* pSocket = new CAsyncSocket;
int iPort = 500;
pSocket->Create( iPort, SOCK_STREAM );

-obislavu-

 

[43214007]

I've tried to create the object in several ways. In my original ActiveX the CAsyncSocket object is a member variable of the COleControl and I create it on the heap.

I can trace into the mfc to see what happens. This MFC function returns FALSE:


BOOL CAsyncSocket::Create(UINT nSocketPort, int nSocketType,
long lEvent, LPCTSTR lpszSocketAddress)
{
if (Socket(nSocketType, lEvent))
{
if (Bind(nSocketPort,lpszSocketAddress))
return TRUE;
int nResult = GetLastError();
Close();
WSASetLastError(nResult);
}
return FALSE;
}
It never reaches the bind function.

 

[43214007]

I have been able to find the problem myself by remaining to search using google. It seems when you create a standard MFC-Exe project with the Classwizzard it automatically adds this code to the function InitInstance:

if (!AfxSocketInit())
{ AfxMessageBox(IDP_SOCKETS_INIT_FAILED);
return FALSE;
}

However when you create a standard ActiveX it does not. This is why the socket cannot be created. Adding this code to my ActiveX was the solution to the problem.