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70
Table
6-9
Vertical
tab commands
Function
Control
code
Advance paper to next tab position CHR$(ll)
Set vertical
tabs at nl, n.2, etc.
(ESC)"B"CHR$(nl)
CHR$(nZ).....CHR$(O)
Set vertical
tabs every n lines
One-time vertical
tab
(ESC) "e" 1 CHR$(n)
(ESC) "f' 1 CHR$(n)
W Vertical tab channels
Vertical tab channels are especially helpful in two situations.
The first occurs when you are writing a program to accompany
a preprinted
form that can accommodate
various
types
of
responces.
The second occurs when you create a multipage
form or report with different vertical tabs on each page.
Table
6-10
Vertical
tab channel
commands
Function
Control
code
Set vertical
tabs at nl, ~2, etc. (ESC)"b"CHR$(nO) CHR$(nl)
as channel nO
CHR$(nZ).....CHR$(O)
Select vertical
channel nO
(ESC)"I"CHR$(nO)
You can store up to eight channels
of tab stops. They are
numbered
from 0 to 7. If you have already stored a set using
(ESC)"B"
command,
your printer has labelled it as channel 0.
Try this program how to see the vertical tab channels work.
' Demo of vertical
tab channels
;: LPRINT CHR$(27);"b";CHR$(1);CHR$(lO);CHR$(2O):
CHRS(O);
30 LPRINT CHR$(27);"b";CHR$(2);CHR$(l5);CHR$(25);
CHRS(O);
40 LPRINT CHR$(27 );"b";CHR$(3);CHR$(17);CHR$(28);
CHRS(O) ;
50 ' Use vertical
60 FOR I=1 TO 3
70 LPRI NT "TOP OF
tab channels
FORM"
80 LPRINT CHR$(27);"/";CHR$(I);
90 LPRINT CHR$(ll);
100 LPRINT "1ST TAB OF CHANNEL"; I
110 LPRINT CHR$(ll);
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