IDebugObject::IsNullReference
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
Tests whether this object is a null reference.
Syntax
HRESULT IsNullReference(
BOOL* pfIsNull
);
int IsNullReference(
out int 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.