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# IsNull Function

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

## Sintaxe:

    IsNull (Var)

## Valor de retorno:

Bool

## Parámetros:

Var: 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.

Null - This value is used for a variant data sub type without valid contents.

## Códigos de erro

5 Chamada de procedemento incorrecta

## Exemplo:

    Sub ExampleIsNull
    Dim vVar As Variant
        MsgBox IsNull(vVar)
    End Sub