From the FAQ:At the moment, it is available for your viewing pleasure here:http://www.dssd.ca/Wine-FAQ.html
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Will MFC work with Wine? What do I need to do?
Work is underway to support this. In fact a libmfc42.so has already been written. You can expect a working MFC porting system relatively soon.
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What is the status of this libmfc? It's not mentioned in the status page
http://www.winehq.com/about/index.php?status
Thanks
bye Fabi