Loadtypelib error in vs2015

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COM

VS2015

VC++

We are converting our projects from vs2005 to vs2015. We able to clear the build error but now we are getting runtime error at LoadTypeLib function call

Error is "Error loading type library/DLL"

Below is the code

HRESULT LoadTypeInfoFromThisModule(REFIID riid, ITypeInfo **ppti) 
{
	*ppti = 0;
    char szFileName[MAX_PATH];

    GetModuleFileNameA((HMODULE)moduleHandle, szFileName, MAX_PATH);

    OLECHAR wszFileName[MAX_PATH];

    mbstowcs(wszFileName, szFileName, MAX_PATH);

    ITypeLib *ptl = 0;

    HRESULT hr = LoadTypeLib(wszFileName, &ptl);

    if (SUCCEEDED(hr)) 
	{
        hr = ptl->GetTypeInfoOfGuid(riid, ppti);
        ptl->Release();
    }

    return hr;
}

May I know why this error will be thrown. The same code is working fine in vs2005

What I have tried:

If i use the vs2005 dll with in VS2015 project then it able to load