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---
# dispinterface
Places an interface in the .idl file as a dispatch interface.  
  
## Syntax  
  
```  
  
[dispinterface]  
  
```  
  
## Remarks  
 When the **dispinterface** C++ attribute precedes an interface, it causes the interface to be placed inside the library block in the generated .idl file.  
  
 Unless you specify a base class, a dispatch interface will derive from `IDispatch`. You must specify an [id](../windows/id.md) for the members of a dispatch interface.  
  
 The usage example for [dispinterface](http://msdn.microsoft.com/library/windows/desktop/aa366802) in the MIDL documentation:  
  
```  
dispinterface helloPro   
   { interface hello; };   
```  
  
 is not valid for the **dispinterface** attribute.  
  
## Example  
 See the example for [bindable](../windows/bindable.md) for an example of how to use **dispinterface**.  
  
## Requirements  
  
### Attribute Context  
  
|||  
|-|-|  
|**Applies to**|`interface`|  
|**Repeatable**|No|  
|**Required attributes**|None|  
|**Invalid attributes**|**dual**, **object**, **oleautomation**, `local`, **ms_union**|  
  
 For more information, see [Attribute Contexts](../windows/attribute-contexts.md).  
  
## See Also  
 [IDL Attributes](../windows/idl-attributes.md)   
 [Attributes by Usage](../windows/attributes-by-usage.md)   
 [uuid](../windows/uuid-cpp-attributes.md)   
 [dual](../windows/dual.md)   
 [custom](../windows/custom-cpp.md)   
 [object](../windows/object-cpp.md)   
 [__interface](../cpp/interface.md)