If you load this DLL via DrRacket, then you won't see output, because stdout isn't connected to anything in particular in a GUI appplication. That is, stdout at the C level is not redirected to the Racket current output port.
If you use a command shell, run plain Racket, and then call the DLL, then you should see the output. Or, if you use a shell to start DrRacket as racket -l drracket then output from the DLL will go to that shell window. At Tue, 19 Feb 2013 13:30:58 +0100, [email protected] wrote: > Hello Danny, > > here you are: > > C++ Code: > > [Code_Begin] > #include <stdio.h> > > extern "C" > { > __declspec(dllexport) void DisplayHelloFromDLL() > { > printf ("Hello from DLL !\n"); > fflush(stdout); > } > } > > [Code_End] > > (define-ffi-definer define-dreamlog (ffi-lib > "D:\\__w32\\DreamLogging\\x64\\Release\\DreamLogging.dll")) > > > (define-dreamlog DisplayHelloFromDLL (_fun -> (r : _void))) > (DisplayHelloFromDLL) > > Result: No output. > > > Yours, > ____________________ > Racket Users list: > http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
