---
description: "Learn more about: _bstr_t::Attach"
title: "_bstr_t::Attach"
ms.date: 02/02/2021
f1_keywords: ["_bstr_t::Attach"]
helpviewer_keywords: ["Attach method [C++]"]
---
# `_bstr_t::Attach`

**Microsoft Specific**

Links a `_bstr_t` wrapper to a `BSTR`.

## Syntax

```cpp
void Attach(
   BSTR s
);
```

### Parameters

*`s`*\
A `BSTR` to be associated with, or assigned to, the `_bstr_t` variable.

## Remarks

If the `_bstr_t` was previously attached to another `BSTR`, the `_bstr_t` will clean up the `BSTR` resource, if no other `_bstr_t` variables are using the `BSTR`.

## Example

See [`_bstr_t::Assign`](../cpp/bstr-t-assign.md) for an example using **`Attach`**.

**END Microsoft Specific**

## See also

[`_bstr_t` Class](../cpp/bstr-t-class.md)