Question

I am trying to use a predefined function but keep getting an AccessViolationException. I am using com objects as well. I call the function put_ClassName(BSTR obj) but keep getting an exception.

This is probably a silly error but here is a sample:

IUIAutomationProxyFactory* factory;
IUIAutomationProxyFactoryEntry* entry;
IUIAutomationProxyFactoryMapping* pMap;
LPCWSTR className = L"CustomUIAutomationCPP";
BSTR name;

CoInitialize(NULL);
HRESULT hr = CoCreateInstance(CLSID_CUIAutomation, NULL, CLSCTX_ALL, IID_IUIAutomation, (void**)&pAutomation);
(*pAutomation).get_ProxyFactoryMapping(&pMap);
factory = new CustomProxyFactory();
(*pAutomation).CreateProxyFactoryEntry(factory, &entry);

name = SysAllocString(className);
(*entry).put_ClassName(className);

I have no clue why I am getting this error. Any help is much appreciated.

EDIT 1

It seems I am not getting the mapping to the proxy table with the above call to:

(*pAutomation).get_ProxyFactoryMapping(&pMap);

Can anyone tell me if there is another way to get the table mapping??

Answer 1

You haven’t assinged anything to entry, right now it’s just an uninitialised pointer.