Re: Cannot use 'call_back' for a procedure

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Finally solved it:

I decided not to trust the FreeImage documentation which says it uses stdcall conventions. I tried cdecl conventions and the error handler returned to me! I used: 

c_proc(xfiSetOutputMessage,{call_back({'+',routine_id("FreeImageErrorHandler")})})


I assume that the other calls to FreeImage must use stdcall or else nothing would work. So this must be something that the FreeImage writers let slip by.

Arthur

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