Currently the splashscreen native library uses a plain fprintf(stderr, "") approach to report any critical issues. Actually the library should be considered a part of the java launcher, and hence it should use the launcher error reporting facilities:

1. The error message texts should be located in emessages.h file. This might enable L10N of the messages.
2. To report the warnings and errors we should use the ReportErrorMessage function in java.h. This enables to report the messages correctly even if we're running under javaw.