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CHAPTER 7
INDIVIDUAL CALL DESCRIPTIONS
This chapter provides a full description of each Call as used for the BASIC languages (Interpreted
BASIC, QuickBASIC, and QBASIC). Note that throughout this manual,
Interpreted BASIC = BASIC, BASICA
,
and
GW BASIC
.
Descriptions are in the alphabetical order of the Call names.
Each of the descriptions discusses the following subjects: Purpose,
format
,
in parameters
,
out
parameters , return values , see also , comments ,
and
examples .
In each of the Call descriptions, format is in the form
Returnvalue = FunctionName( Parameter 1
I
* * *
I
Parameter n
)
and does not reflect the syntax for any language. Under this scheme, examples reflect the syntaxes
for their respective languages and takes the forms
Interpreted BASIC
xxl0
CALL
FunctionName (Parameterl,
,
ParameterN, Returnvalue)
QuickBASIC
Returnvalue
=
FunctionName (Parameterl,
,
PararneterN)
QBASIC
CALL
ABSOLUTE
(Parameter1
,
,
ParanmterN, Returnvalue, E'unctionName)
* * +
Note On Handle-Type Variables!
Many of the functions described in this chapter require the use of Handles. In Interpreted BASIC, this
variable is a single-precision floating-point value (the default variable type!); however, in QuickBASIC
and QBASIC, this value may also be declared as a long integer, as shown in the example programs of
this chapter. In either case, a Handle is a 4-byte user-declared variable used strictly by the software
driver.
* * *
7 - 1
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