There are many tools to generate C# bindings from header files. I haven't used one in a long time so can't remember any names but google and you will find. None

There are many tools to generate C# bindings from header files. I haven't used one in a long time so can't remember any names but google and you will find. None of them are perfect so you always need to review the result and change some data types to more standard ones but at least it saves you writing the bulk of the code. You usually run into the problem that the header files include other header files and you get this long dependency chain where somewhere in the chain some type is not recognized by the converter, to solve this the best is to cherry-pick the dependent types from the included header files and just put everything into one big flat header before passing into the tool. Macros can also be a PITA that you have to rewrite into functions and constants before generating. You also have http://pinvoke.net/ http://pinvoke.net/ with almost all win32 functions wrapped already. Same there though, review before use because it's a wiki and the quality is varying.