Method

IsNull

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Description

Indicates whether the value passed is null.

Usage

result = IsNull(value)

Part	Type	Description
result	Boolean	True if arg is a valid object; False otherwise.
value	Variant	Variable, property, or object whose data type is being investigated.

Notes

A common usage of IsNull is to determine whether variable or property that is an object type contains a reference to an object or not.

While you can pass non-object data types (String for example) to IsNull, it will always return False.

Sample code

If the value passed to IsNull does not contain an object instance, then IsNull returns True. For example this code returns True:

Var b As Boolean
Var f as FolderItem
b = IsNull(f)

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This code returns False:

Var b As Boolean
Var f as FolderItem = SpecialFolder.Desktop
b = IsNull(f)

Compatibility

All project types on all supported operating systems.

See also

Boolean, Variant data types.