Re: Sharing a smart pointer between threads

I have a COM object smart pointer I'd like to share between threads (as
in the code below). The object works great in the thread it was created
in, but I get an exception when I use it in the thread I'm sending it
to.

How can I successfully share this COM object smart pointer?

Thanks,
PaulH

MyLib::IInterfacePtr m_Obj;
CMyApp::OnTimer()
{
   m_dialog->PostMessage(MYWM_UPDATE,
reinterpret_cast<WPARAM>(&m_Obj));
}

CMyDlg::OnUpdateMsg(WPARAM wParam, LPARAM /*lParam*/)
{
   MyLib::IInterfacePtr pObj = *reinterpret_cast<MyLib::IInterfacePtr
*>(wParam);
   pObj->DoSomething(); //exception here
   //...
}