I want to compare two objects. The objects type is MS Outlook inspectors.
Here is the code.

struct Outlook::_Inspector* activeIn;
m_spApp-ActiveInspector(&activeIn);
if(NULL == activeIn)
continue;
CComPtrIUnknown activeUnk;
activeIn-QueryInterface(IID_IUnknown, (void**)&activeUnk);


struct Outlook::_Inspector* inspector;
CComPtrIUnknown spInspectUnk;
//IUnknown* spInspectUnk;

///*
for(long i=1;i=nNowNum;i++)
{
inspectors-Item(CComVariant(i),&inspector);

if(NULL == inspector || 0xcccccccc == (long)inspector)
continue;

inspector-IsWordMail(&bWordMail);
if(!bWordMail)
continue;

inspector-QueryInterface(IID_IUnknown, (void**)&spInspectUnk);

if(spInspectUnk.IsEqualObject(activeUnk))
{
//dosomething
//how to come in this block
}
}

I set a timer to check inspectors collection! But every time the value of
spInspectUnk changes. Would you like to tell me how to compare them?