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\<bookmark_value\>IsNull function\</bookmark_value\>\<bookmark_value\>Null value\</bookmark_value\>

# IsNull Function

Tests if a Variant contains the special Null value, indicating that the variable does not contains data.

## Syntax:

    IsNull (Var)

## Return value:

Bool

## Parameters:

\<emph\>Var:\</emph\> Any variable that you want to test. This function returns True if the Variant contains the Null value, or False if the Variant does not contain the Null value.

\<emph\>Null\</emph\> - This value is used for a variant data sub type without valid contents.

## Error codes:

5 Invalid procedure call

## Example:

    Sub ExampleIsNull

    Dim vVar As Variant

        MsgBox IsNull(vVar)

    End Sub