Predefined Constants

TRUE

FALSE

NULL

PI

ON

OFF

These constants are predefined and can be used as they were built into the language.  You can defined your own constants by using the CONST statement.

They are defined s follows

TRUE        1

FALSE       0

ON          1

OFF         0

NULL        0

PI          3.14159265359

Example:

DIM hControl AS HANDLE

hControl = NULL

PRINT PI,

GRAPH.Grid( nGraph, ON )   ' Turn on the grid