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VBScript Functions
This will provide you with a quick look at the more important VBScript
functions. They include functions for type checking, typecasting, formatting,
math, date manipulation, string manipulation, and more.
Type Checking Functions
These functions allow you to determine the data subtype of a variable or
expression.
§ VarType (expression) returns an integer code that corresponds to the
data type.
§ TypeName (expression) returns a string with the name of the data type
rather than a code.
§ IsNumeric (expression) returns a Boolean value of True if the
expression is numeric data, and False otherwise.
§ IsArray (expression) returns a Boolean value of True if the
expression is an array, and False otherwise.
§ IsDate(expression) returns a Boolean value of True if the expression
is date/time data, and False otherwise.
§ IsEmpty (expression) returns a Boolean value of True if the expression
is an empty value (uninitialized variable), and False otherwise.
§ IsNull (expression) returns a Boolean value of True if the expression
contains no valid data, and False otherwise.
§ IsObject (expression) returns a Boolean value of True if the
expression is an object, and False otherwise.