# These errors....

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[Linker error] undefined reference to ChoosePixelFormat@8' [Linker error] undefined reference to SetPixelFormat@12' [Linker error] undefined reference to SwapBuffers@4' How do I fix those errors? They come up whenever I try to compile a program. Im using dev-cpp.

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Those errors mean you are not linking against the right library.

For example, undefined reference to ChoosePixelFormat@8' means your linker is looking for a function called 'ChoosePixelFormat' that takes 8 bytes of parameters. It searches through all the object files and libraries looking for the function, and the linker can't find it.

You need to tell the linker where to search for the function. It is probably in a library called opengl32.lib.

In your linker options, add the library file name to the list.

I don't use dev-cpp, so I don't know the details of doing it, nor the dev-c++ file locations. You might need to adjust your .lib search paths or otherwise make sure your configuration is correct.

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Quote:
 by http://msdn.microsoft.com/library/default.asp?url=/library/en-us/opengl/ntopnglr_2qb8.aspChoosePixelFormat...Requirements Windows NT/2000: Requires Windows NT 3.5 or later. Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95. Header: Declared in wingdi.h. Import Library: Use gdi32.lib.

Try linking against gdi32.lib.

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