---
title: "unique (C++) | Microsoft Docs"
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---
# unique (C++)
Specifies a unique pointer.  
  
## Syntax  
  
```  
  
[unique]  
  
```  
  
## Remarks  
 The **unique** C++ attribute has the same functionality as the [unique](http://msdn.microsoft.com/library/windows/desktop/aa367294) MIDL attribute.  
  
## Example  
 See the [ref](../windows/ref-cpp.md) example for a sample use of **unique**.  
  
## Requirements  
  
### Attribute Context  
  
|||  
|-|-|  
|**Applies to**|`typedef`, `struct`, **union**, interface parameter, interface method|  
|**Repeatable**|No|  
|**Required attributes**|None|  
|**Invalid attributes**|None|  
  
 For more information about the attribute contexts, see [Attribute Contexts](../windows/attribute-contexts.md).  
  
## See Also  
 [IDL Attributes](../windows/idl-attributes.md)   
 [Typedef, Enum, Union, and Struct Attributes](../windows/typedef-enum-union-and-struct-attributes.md)   
 [Parameter Attributes](../windows/parameter-attributes.md)