Reference Manual - 1.0.0
IDirectFBScreen   TestOutputConfiguration

Test output configuration.

TestOutputConfiguration (
  IDirectFBScreen   * thiz,
  int   output,
  const DFBScreenOutputConfig   * config,
  DFBScreenOutputConfigFlags   * ret_failed
);

If configuration fails and 'ret_failed' is not NULL it will indicate which fields of the configuration caused the error.