This variable allows you to redefine the line drawing characters on DOS systems. The value of the DOS_BOX_CHARS variable is a list of characters that draw the line segments. It should be a thirteen-character string that corresponds, in order, to the line segments as listed below. To redefine the DOS line drawing characters, specify the characters you want in the following order:
1. horizontal line
2. vertical line
3. upper left corner
4. upper right corner
5. lower left corner
6. lower right corner
Four three-way intersections--
7. missing bottom line
8. missing left line
9. missing top line
10. missing right line,
and--
11. the four-way intersection
12. upper-half block
13. lower-half block
These line drawing characters may also be specified by decimal value.
Characters which are not available on a particular machine should be specified with
the decimal value "0".
The default value for DOS_BOX_CHARS depends on the CODE_SYSTEM variable. If CODE_SYSTEM is not set, or is set to "0" (or ASCII or EBCDIC), then the default is:
DOS_BOX_CHARS 196 179 218 191 192 217 193 195 194 180 197 223 220
If CODE_SYSTEM is set to a non-zero value, which is the case in the ACUCOBOL-GT JPN version, then the default is:
DOS_BOX_CHARS 6 5 1 2 3 4 21 25 22 23 16 0 0