idebugobject-isnullreference.md

description	title	ms.date	ms.topic	f1_keywords	helpviewer_keywords	author	ms.author	manager	ms.subservice	dev_langs
Tests whether this object is a null reference.	IDebugObject::IsNullReference	11/04/2016	reference	IDebugObject::IsNullReference	IDebugObject::IsNullReference method	maiak	maiak	mijacobs	debug-diagnostics	CPP CSharp

IDebugObject::IsNullReference

Tests whether this object is a null reference.

Syntax

C#

int IsNullReference(
   out int pfIsNull
);

C++

HRESULT IsNullReference( 
   BOOL* pfIsNull
);

---

Parameters

pfIsNull
[out] Returns non-zero (TRUE) if this object is a null reference; otherwise, returns zero (FALSE).

Return Value

If successful, returns S_OK; otherwise, returns an error code.

Remarks

A null reference means an empty object or an object that has not been assigned to.

See also

• IDebugObject