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GeoBASIC Reference Manual 2.GeoBasic Constructs
TPS1100-Version 1.30 2-9
data type
_Token
. Actual values of such parameters must be of type string literal
or string constant.
Note Neither variables nor string expressions are allowed as actual values for
parameters of type _Token.
Examples:
♦
A typical example would be to create a dialog with graphical output
capabilities.
'a string constant
CONST Help_Token = "This function defines "+
"the standard " +
"graph dialog."
MMI_CreateGraphDialog ("GRAPH",
"Graphical Sit.",
Help_Token)
♦
Variables and string expressions are not allowed as actual parameters.
Therefore the following example is multiple
erroneous in the call of
CreateGraphDialog
, because there are tokenizable strings allowed only.
DIM Help_Token AS String255
DIM capt
AS String20
capt = "GRAPH"
HelpToken = "This function defines the "
"standard graph dialog." 'a string
'constant
MMI_CreateGraphDialog(capt, "Graphical"+" sit.",
Help_Token) 'error!!!
2.1.8 Logical Values
Logical values are written as
TRUE
or
FALSE
. They are predefined names (not
reserved words) and can be used wherever logical constants are allowed. As usual
for names, upper and lower case letters are not distinguished.