233
P
P
R
R
O
O
G
G
R
R
A
A
M
M
M
M
I
I
N
N
G
G
C
C
O
O
M
M
M
M
A
A
N
N
D
D
S
S
All programming commands can by typed in by
hand but, as with the MATH commands, can
also be obtained from a menu. Press SHIFT
CMDS to display this.
In this section I will only be covering those commands which I have used
regularly and so regard as important. These may not be the same as the
ones you regard as important. If so, consult the manual.
T
T
h
h
e
e
A
A
p
p
l
l
e
e
t
t
c
c
o
o
m
m
m
m
a
a
n
n
d
d
s
s
These control aspects of the aplet.
CHECK n, UNCHECK n
These commands put or remove a check next
to the equation whose number is given by n.
An interesting bug is actually quite useful: if
you UNCHECK 0 then all equations are
unchecked instead of only equation 0.
Unfortunately the same is not true for the
CHECK command. As they say in the trade: “It’s not a bug, it’s a feature!”.
SELECT <name>
This is used to set the active aplet if
necessary. If the name has spaces in it then it
must be enclosed in quotes. This is not usually
required as the program will normally be called
by the active aplet anyway. I have only used it
with ‘stand-alone’ programs not attached to an
aplet so that they can temporarily ‘borrow’ abilities belonging to an aplet.
However, it could also be used to create an aplet that had two ‘parents’ if you
required it to inherit abilities from both. You could then swap from one parent
to the other using this command. This could be quite cumbersome but might
add some powerful features.
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