Microsoft® Visual Basic® Scripting Edition IsEmpty Function | Language Reference Version 1

See Also

##### Description

> Returns a Boolean value indicating whether a variable has been initialized.

##### Syntax

> IsEmpty(expression)

> The expression argument can be any expression. However, because IsEmpty is used to determine if individual variables are initialized, the expression argument is most often a single variable name.

##### Remarks

> IsEmpty returns True if the variable is uninitialized, or is explicitly set to Empty; otherwise, it returns False. False is always returned if expression contains more than one variable.

> The following example uses the IsEmpty function to determine whether a variable has been initialized:

> >     Dim MyVar, MyCheck
> >     MyCheck = IsEmpty(MyVar)      ' Returns True.

> >     MyVar = Null                  ' Assign Null.
> >     MyCheck = IsEmpty(MyVar)      ' Returns False.

> >     MyVar = Empty                 ' Assign Empty.
> >     MyCheck = IsEmpty(MyVar)      ' Returns True.

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