Hello sleipnir214,
Thanks for your answer. I am in an AIX and SGI MOTIF / OpenGL environment. Your provided http address is unfortunately unavailable.
I have an application which does not give a proper error message to the user, so I have to program the message in the C++ api. The form and colour does not matter, but it has to be as small and easy as possible. The code samples I have found until today are all quite complex (some hundert lines of code).
Best regards
Stefan