---
description: "Learn more about: _com_ptr_t::operator ="
title: "_com_ptr_t::operator ="
ms.date: "11/04/2016"
f1_keywords: ["_com_ptr_t.operator=", "_com_ptr_t::operator="]
helpviewer_keywords: ["_com_ptr_t [C++]"]
ms.assetid: 46849455-371c-4d0f-bae4-c1f737d2ca4a
---
# _com_ptr_t::operator =

**Microsoft Specific**

Assigns a new value to an existing `_com_ptr_t` object.

## Syntax

```
template<typename _OtherIID>
_com_ptr_t& operator=( const _com_ptr_t<_OtherIID>& p );

// Sets a smart pointer to be a different smart pointer of a different
// type or a different raw interface pointer. QueryInterface is called
// to find an interface pointer of this smart pointer's type, and
// Release is called to decrement the reference count for the previously
// encapsulated pointer. If QueryInterface fails with an E_NOINTERFACE,
// a NULL smart pointer results.
template<typename _InterfaceType>
_com_ptr_t& operator=(_InterfaceType* p );

// Encapsulates a raw interface pointer of this smart pointer's type.
// AddRef is called to increment the reference count for the encapsulated
// interface pointer, and Release is called to decrement the reference
// count for the previously encapsulated pointer.
template<> _com_ptr_t&
operator=( Interface* pInterface ) throw();

// Sets a smart pointer to be a copy of another instance of the same
// smart pointer of the same type. AddRef is called to increment the
// reference count for the encapsulated interface pointer, and Release
// is called to decrement the reference count for the previously
// encapsulated pointer.
_com_ptr_t& operator=( const _com_ptr_t& cp ) throw();

// Sets a smart pointer to NULL. The NULL argument must be a zero.
_com_ptr_t& operator=( int null );

// Sets a smart pointer to be a _variant_t object. The encapsulated
// VARIANT must be of type VT_DISPATCH or VT_UNKNOWN, or it can be
// converted to one of these two types. If QueryInterface fails with an
// E_NOINTERFACE error, a NULL smart pointer results.
_com_ptr_t& operator=( const _variant_t& varSrc );
```

## Remarks

Assigns an interface pointer to this `_com_ptr_t` object.

**END Microsoft Specific**

## See also

[_com_ptr_t Class](../cpp/com-ptr-t-class.md)