IsNull Function

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

Returns True when an object variable is passed that does not refer to a valid object, such as a newly created object that has not yet been assigned or an object assigned to the Nothing literal.

სინტაქსი


IsNull (Var)

დაბრუნებული მნიშვნელობა:

Boolean

პარამეტრები:

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.

Error codes:

D'oh! You found a bug (text/sbasic/shared/00000003.xhp#err5 not found).

მაგალითი:


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