You need to list them all on the same line.

i.e.

  ffi_lib 'user32', 'msvcrt'


2009/12/19 rogerdpack <rogerpack2005@gmail.com>:

> For my curiosity...
>
> Currently with this snippet:
>
>  ffi_lib 'user32'
>  ffi_lib 'msvcrt'
>  attach_function 'FindWindow', [ :string, :string], :pointer
>
> I get this response
> #<FFI::NotFoundError: Function 'FindWindow' not found in [msvcrt]>
> Function 'FindWindow' not found in [msvcrt]
>
> Is it expected for that to be [msvcrt] and not [msvcrt, user32]?
>
> Also would it be conceivably possible to have a verbose mode that
> outputs..
> #<FFI::NotFoundError: Function 'FindWindow' not found in [msvcrt]>
> Function 'FindWindow' not found in [msvcrt]
> possible options are: [FindWindowA, FindWindowExA, FindWindowW,
> AlignRects...]
>
> Just wondering.
> Thanks.
> -r
>