Can't debug my ATL-OCX application

Question

Hello

I have a legacy C++ application, with the following configuration:

1. Its a COM server, without MFC, with ATL

2. Implements CFrameWindowImpl<>

3. Which contains CWindowImpl<>

4. Which contains a third party OCX

Everything works fine if I build in release or debug, but when I try to use the debugger to trace the execution I keep getting an exception. The COLEException occurs here:

hRes = poaxWindowP->CreateControlEx(bstrURL,NULL,NULL,&pitfUnknownPtrP,__uuidof(IUnknown));

In here:

HRESULT ActivateAx( 

  CComQIPtr<IOleClientSite> spClientSite(GetControllingUnknown());
  m_spOleObject->SetClientSite(spClientSite);

So the debugger is useless. Any help would be appreciated.

---

Guy Harel

Answer 1

What is the COLEException ?

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Reply, then visible.

Answer 2

I tried to catch the COleException but the project is ATL and including <afxdisp.h> just wont compile. There is an OleException during ActivateAx() SetClientSite():

if (m_dwMiscStatus & OLEMISC_SETCLIENTSITEFIRST)
{
  CComQIPtr<IOleClientSite> spClientSite(GetControllingUnknown());
  m_spOleObject->SetClientSite(spClientSite); <- COleException
}

According to a post the OCX is looking for "ambient" properties and cannot find them?

---

Guy Harel

Answer 3

Found a trick. In VS menu Debug/Exceptions, I have added "COleExeption" and unchecked it. Now I can use the debugger.

---

Guy Harel