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POImplement COM interface C++ / VC++ 6.0 / MFC
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copied!<p>Entry level programmer here trying to implement a COM interface. I am working on a program that interfaces with the Aloha point of sale system. Aloha uses COM to work with external programs. I am trying to intercept card data from the mag card reader, which is an OPOS reader, not a keyboard wedge. The documentation I have doesn't explain how to implement this particular interface, but it does explain how to implement a similar one. I have tried to follow this example but I am getting no where. Support from Aloha is non-existent, their documentation is poor, outdated and sometimes just wrong, even though I have paid for a license.</p> <p>I tried to make a simple app just to test this functionality. Here is what I did:</p> <p>1) create a new project in vc++ 6.0 using ATL COM app wizard 2) server type dll 3) insert new atl object -> simple object 4) right click on my new class and choose implement interface 5) browse for type library, chose Iber.tlb (Aloha's tlb) 6) chose the interface I want to implement</p> <p>That made a .h, .cpp and .rgs file.</p> <p>The .h file has:</p> <pre><code>public: // IInterceptMagcard STDMETHOD(InterceptMagcard)(BSTR bstrAccountNumber, BSTR bstrCustomerName, BSTR bstrExpirationDate, BSTR bstrTrack1Info, BSTR bstrTrack2Info, BSTR bstrTrack3Info, BSTR bstrRawMagcardData, LONG * bWasDataHandled) { if (bWasDataHandled == NULL) return E_POINTER; return E_NOTIMPL; } </code></pre> <p>Is that where I implement my code? I put some test code in there to write out to a txt file just to test it. I then used:</p> <pre><code>HRESULT hr = CoCreateInstance(CLSID_AlohaMag, NULL, CLSCTX_INPROC_SERVER, IID_IAlohaMag, (void **) &g_pIInterceptMagcard); </code></pre> <p>where g_pIInterceptMagcard is a pointer to my interface class created with the wizard above.</p> <p>When I try to register I get the following HRESULT: 0x80040112 That is "class not licensed for use."</p> <p>Does that mean my program didn't make the necessary registry entries?</p>

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