Using COM dll without registration (Help of Manifest file)

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Hi,

I want to use the com dll without doing the registration.
I followed the step as mentioned in the link http://msdn.microsoft.com/en-us/library/ms973913.aspx[^]

But i am getting "access violation" error if the line CreateInstance() is executed

C++

int _tmain(int argc, _TCHAR* argv[])
{
	CoInitializeEx(0, COINIT_APARTMENTTHREADED);

	IParameterDLLPtr ptr;
	CLSID iID = __uuidof(Sample);
	HRESULT hr = ptr.CreateInstance(__uuidof(Sample), NULL, CLSCTX_INPROC);
	if (SUCCEEDED(hr))
	{
          ptr.Release();
        }
CoUninitialize();
return 0;
}

I am sure the GUID is reading from the manifest file. This is confirmed by doing trace with the help of sxstrace.exe

Please help me why i am getting the crash and need some help on this

Thanks in advance
Durga

Posted 28-Jan-13 4:33am

Durga_Devi

Updated 28-Jan-13 4:42am

Sandeep Mewara

v2

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Richard MacCutchan · Answer 1 · 2013-01-28T05:14:00

Solution 1

C++

IParameterDLLPtr ptr;
CLSID iID = __uuidof(Sample);
HRESULT hr = ptr.CreateInstance(__uuidof(Sample), NULL, CLSCTX_INPROC);

The variable ptr needs to be initialised to some object before you can call one of its methods.

You can do this much more easily by using the CoLoadLibrary function[^].

Posted 28-Jan-13 5:14am

Richard MacCutchan

Updated 28-Jan-13 5:16am

v2