A number of useful constants you can use in your code are built into VBScript. Constants provide a convenient way to use specific values without actually having to remember the value itself. Using constants also makes your code more maintainable should the value of any constant ever change. Because these constants are already defined in VBScript, you don't need to explicitly declare them in your code. Simply use them in place of the values they represent.
Here are the various categories of constants provided in VBScript and a brief description of each:
Defines eight basic colors that can be used in scripting.
Date and Time Constants
Defines date and time constants used by various date and time functions.
Date Format Constants
Defines constants used to format dates and times.
Defines constants that don't conveniently fit into any other category.
Defines constants used in the MsgBox function to describe button visibility, labeling, behavior, and return values.
Defines a variety of non-printable characters used in string manipulation.
Defines constants used with functions that format numbers.
Defines the various Variant subtypes.