OpenOffice.org Macros Explained - LibreOffice-NA.US

Table 6. Examples of supported Def statements in OpenOffice.org.
Def Statement
DefBool b
DefDate t
DebDbl d
DefInt i
DefLng l
DefObj o
DefVar v
Type
Boolean
Date
Double
Integer
Long
Object
Variant
3.2.3. Assigning values to variables
The purpose of a variable is to hold values. To assign a value to a variable, type the name of the variable,
optional spaces, an equals sign, optional spaces, and the value to assign to the variable, like so:
X = 3.141592654
y = 6
The optional keyword Let may precede the variable name but serves no purpose other than readability. A
similar optional keyword, Set, meant for Object variables, serves no purpose other than readability. These
keywords are rarely used.
3.2.4. Boolean variables are True or False
Boolean variables have two valid values: True or False. They are internally represented by the Integer values
-1 and 0, respectively. Any numeric value assigned to a Boolean that does not precisely evaluate to 0 is
converted to True. The macro in Listing 8 introduces a few new concepts. A string variable, s, accumulates
the results of the calculations, which are displayed in a dialog (see Figure 18). Adding CHR$(10) to the
string causes a new line to be printed in the dialog. Unfortunately, accumulating the results in a string
provides a more complicated macro than using simple statements such as “Print CBool(5=3)”, but the
results are easier to understand (see Figure 18). In the OOo version of the document, a button is frequently
available that allows you to run the macro immediately.
Listing 8. Demonstrate conversion to type boolean.
Sub ExampleBooleanType
Dim b as Boolean
Dim s as String
b = True
b = False
b = (5 = 3) REM Set to False
s = "(5 = 3) => " & b
b = (5 < 7) REM Set to True
s = s & CHR$(10) & "(5 < 7) => " & b
b = 7 REM Set to True because 7 is not 0
s = s & CHR$(10) & "(7) => " & b
MsgBox s
End Sub
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