c++ - How to dynamically linking sapi.dll and making it work? -

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i dynamically bind windows sapi.dll , call code needed 'speak' text on windows - code below (this snippet copied gamedev.net article desmond lang) have no experience in using dll's especialy com. tell me how code should work my? tnx 

   // voice interface pointer     ispvoice* voice = null;      // initialize com     coinitialize ( null );      // create voice instance     cocreateinstance ( clsid_spvoice, null, clsctx_all, iid_ispvoice, (void**)&voice );      // our text spoken     wchar* textbuffer = "hello world";      // use our voice interface speak contents of buffer     voice -> speak ( textbuffer, spf_default, null );


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