Difference between revisions of "???"
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==Purpose== | ==Purpose== | ||
Evaluate expression and output result to printer | Evaluate expression and output result to printer | ||
Revision as of 09:53, 23 October 2009
Purpose
Evaluate expression and output result to printer
Syntax
??? <expC>
See Also
?, ??, CHR(), CTRL(), PRINT, SET CONSOLE, SET DEVICE, SET MAPCHAR, SET PRINT, SET PRINTER, SET SCREENMAP
Description
The ??? command evaluates the specified expression and sends the output to the printer. This command is particularly useful for sending initialization strings to a printer. Initialization strings contain control characters that prescribe certain printing attributes. If your printer driver does not support a certain printing capability, the ??? command can be used to circumvent the driver and send printer control codes directly to the printer. Your printer manual contains a table of control codes and the correct use of each. Printer control codes may contain any printable character with the exception of the double quote mark "". Printable character codes may be expressed in a variety of ways, however strings that name non-printable characters must include curly braces {}. The <expC> can contain directives that are translated from the following table:
| ASCII Code | Control Character Specification |
|---|---|
| 0 | {NULL} or {CTRL @} |
| 1 | {CTRL-A} |
| 2 | {CTRL-B} |
| 3 | {CTRL-C} |
| 4 | {CTRL-D} |
| 5 | {CTRL-E} |
| 6 | {CTRL-F} |
| 7 | {BELL} or {CTRL-G} |
| 8 | {BACKSPACE} go {CTRL-H} |
| 9 | {TAB} or {CTRL-I} |
| 10 | {LINEFEED} or {CTRL-J} |
| 11 | {CTRL-K} |
| 12 | {CTRL-L} |
| 13 | {RETURN} or {CTRL-M} |
| 14 | {CTRL-N} |
| 15 | {CTRL-O} |
| 16 | {CTRL-P} |
| 17 | {CTRL-Q} |
| 18 | {CTRL-R} |
| 19 | {CTRL-S} |
| 20 | {CTRL-T} |
| 21 | {CTRL-U} |
| 22 | {CTRL-V} |
| 23 | {CTRL-W} |
| 24 | {CTRL-X} |
| 25 | {CTRL-Y} |
| 26 | {CTRL-Z} |
| 27 | {ESCAPE} or {ESC} or {CTRL-[} |
| 28 | {CTRL-} |
| 29 | {CTRL-]} |
| 30 | {CTRL-^} |
| 31 | {CTRL-_} |
| 32 | {DEL} or {DELETE} |
Example
??? "{ESCAPE}24"
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
