From OpenSCADAWiki
Parameter's flags (enum — IO::IOFlgs):
- IO::Default (0x00) — default mode (input);
- IO::Output (0x01) — output;
- IO::Return (0x02) — return;
- IO::FullText (0x04) — full-text string;
- IO::Selectable (0x08) — selectable;
- IO::TransltText (0x1000) — being translated string, TPrmTempl reserves the flags range [0x10...0x0800].