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Variables declaration

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Hello all. I don''t know if this sould be posted in the DirectX department or not, but Iæll give it a shot here. I''m writting a C++ class that inits some directShow stuff for playing a mp3. I have made some member variables: IGraphBuilder *m_GraphBuilder; in the contructor I try to set it to NULL: m_GraphBuilder = NULL; And then in the Init function, I try to use it with the CoCreateInstance-Function. But here it fails. I don''t know if my contructor runs the way it''s supposed to do, maybe I do something wrong in the contructor or somewere else, I don''t know. Please help me out here, Thanks Endre

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