Constants list of the VBScript language

Writing constants (their text notation) can be used anywhere in the script instead of current values, which allows comfortable writing the value without knowing its numeric value. Using the text notation of constants makes the script better arranged and easier modifiable. Because constants are defined in the VBScript, they needn't be defined in the script.

VBScript constants of data type values (See also Data types VBScript):

Constant	Description
true	The keyword of boolean value "True" (corresponds to -1 !!)
false	The keyword of boolean value "False" (corresponds to 0 !!)
Empty	The keyword is used to indicate an uninitialized variable value
Null	The keyword is used to indicate that a variable contains no valid data
Nothing	The keyword is used to indicate that a variable of the Object type doesn't point to any object

VBScript constants of data types:

Constant	Value	Description
vbEmpty	0	uninitialized data type
vbNull	1	contains no valid data
vbBoolean	11	Boolean data type
vbByte	17	Byte data type
vbInteger	2	Integer data type
vbLong	3	Long data type
vbSingle	4	Single data type
vbDouble	5	Double data type
vbDate	7	Date data type
vbString	8	String data type
vbObject	9	Object data type
vbVariant	12	Variant data type
vbArray	8192	Array data type

VBScript string constants (values of these constants can be created also by the Chr function):

Constant	Value	Description
vbCr	Chr(13)	Carriage return
vbCrLf	Chr(13) & Chr(10)	Carriage return–linefeed combination
vbFormFeed	Chr(12)	Form feed; not useful in Windows OS
vbLf	Chr(10)	Line feed
vbNewLine	Chr(13) & Chr(10) or Chr(10)	platform-dependent. Sometimes it is necessary to combine vbCrLf (position on new row start), sometimes it is sufficient vbLf (position on new row)
vbTab	Chr(9)	Horizontal tab

VBScript date and time constants:

Constant	Value	Description
vbSunday	1	Sunday
vbMonday	2	Monday
vbTuesday	3	Tuesday
vbWednesday	4	Wednesday
vbThursday	5	Thursday
vbFriday	6	Friday
vbSaturday	7	Saturday
vbFirstJan1	1	Use the week in which 1st January occurs
vbFirstFourDays	2	Use the 1st week that has at least 4 days in the new year
vbFirstFullWeek	3	Use first full week of the year
vbUseSystem	0	Use the date format contained in the regional settings for your computer
vbUseSystemDayOfWeek	0	Use the day of the week specified in your system settings for the first day of the week