• DBIORTL.DLL This ActiveX DLL compensates for the I/O limitations in Visual Basic and the Windows platform. It contains the needed classes to read from and write to terminal-format files, and local and remote sequential, relative, and indexed files. The remote RMS file access makes use of the Translator RMS Server that resides on the OpenVMS system. An I/O structure similar to the VAX BASIC and DEC BASIC I/O structure is layered on top of Visual Basic using Visual Basic classes such as the following:

  DBFileSeq, for local sequential file I/O
  DBFileRel, for local relative file I/O
  DBFileRMS, for remote file I/O using the Translator RMS Server
  DBFileTFF, for terminal format file I/O

• DBTRMRTL.EXE This ActiveX EXE contains a simple VT100 terminal emulator. This terminal emulator supports the VAX BASIC and DEC BASIC I/O terminal statements such as INPUT, INKEY$, LINPUT, PRINT, MAP PRINT, MAT INPUT, and so on. It contains the following components:

  DBTerminal class
  Visual Basic terminal form
  "About" box

• DB2VBSPT.DLL Because of limitations in Visual Basic (lack of pointer types, for example), this small support DLL is also shipped as part of the RTL kit. It is used by the I/O support routines, RTL, and MAP and RECORD classes.

CONTROL CHARACTERS Mnemonic (Hex ASCII value) Function -------------------------- ---------------------------------------------- NUL (0x00) Ignored BEL (0x07) Sounds a bell tone LF (0x0A) Moves cursor down one line or performs a CR if new line mode is enabled VT (0x0B) Same as LF FF (0x0C) Same as LF CR (0x0D) Moves cursor to the beginning of the line DC1 (0x11) XON DC3 (0x13) XOFF CAN (0x18) Cancels an escape sequence in progress SUB (0x19) Same as CAN ESC (0x1B) Begins an escape sequence DEL (0x1C) Ignored CURSOR CONTROL Name Sequence -------------------------- ---------------------------------------------- Cursor Mode ESC [ ? 25 h (on) ESC [ ? 25 l (off) Cursor Up ESC [ Pn A (Pn lines up) Cursor Down ESC [ Pn B (Pn lines down) Cursor Right ESC [ Pn C (Pn columns right) Cursor Left ESC [ Pn D (Pn columns left) Direct Cursor Address ESC [ Pl ; Pc f or ESC [ Pl ; Pc H (Line Pl, column Pc) Cursor State ESC [ 7 (Save) and ESC [ 8 (Restore)

EDITING FUNCTIONS Name Sequence -------------------------- ---------------------------------------------- Erase to End-of-Line ESC [ 0 K Erase to Start-of-Line ESC [ 1 K Erase Line ESC [ 2 K Erase to End-of-Screen ESC [ 0 J Erase to Start-of-Screen ESC [ 1 J Erase Screen ESC [ 2 J TABS Name Sequence -------------------------- ---------------------------------------------- Set Tab at Current Column ESC H Clear Tab at Current Col. ESC [ g or ESC [ 0 g Clear All Tabs ESC [ 3 g TEXT ATTRIBUTES Name Sequence -------------------------- ---------------------------------------------- Select Attributes ESC [ Ps ... Ps m (Where Ps is: All attributes off - 0 Bold - 1 Underline - 4) REPORTS Name Sequence -------------------------- ---------------------------------------------- Cursor Position Report ESC [ 6 n (Returns ESC [ Pl ; Pc R) (Line Pl, column Pc) Terminal Type Request ESC [ c or ESC [ O c Returns ESC [ ? 1 ; 0 C (base VT100) Status Report ESC [ 5 n (Returns ESC [ 0 n) MISCELLANEOUS Name Sequence -------------------------- ---------------------------------------------- Autowrap ESC [ ? 7 h (On) and ESC [ ? 7 l (Off)