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support_error_info

Implements support for returning detailed errors.

[ support_error_info(
   error_interface=uuid
) ]

Parameter

error_interface
The identifier of the interface implementing IErrorInfo.

Attribute Context

Applies to class
Repeatable Yes
Required attributes None
Invalid attributes None

For more information about the attribute contexts, see Attribute Contexts.

Remarks

The support_error_info C++ attribute implements support for returning detailed, contextual errors encountered by the target object to the client. For the object to support errors, the methods of the IErrorInfo interface must be implemented by the object. For more information, see Supporting IDispatch and IErrorInfo.

This attribute adds the ISupportErrorInfoImpl class as a base class to the target object. This results in a default implementation of ISupportErrorInfo and can be used when a single interface generates errors on an object.

Example

The following code adds default support for the ISupportErrorInfo interface to the CMyClass object.

// cpp_attr_ref_support_error_info.cpp
// compile with: /LD
#define _ATL_ATTRIBUTES
#include "atlbase.h"
#include "atlcom.h"

[module (name="mymod")];
[object, uuid("f0b17d66-dc6e-4662-baaf-76758e09c878")]
__interface IMyErrors
{
};

[ coclass, support_error_info("IMyErrors"),
  uuid("854dd392-bdc7-4781-8667-8757936f2a4f") ]
class CMyClass
{
};

See Also

COM Attributes | Class Attributes | Attributes Samples

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