_com_error::_com_error

Microsoft Specific

Constructs a _com_error object.

_com_error(
   HRESULT hr,
   IErrorInfo* perrinfo = NULL,
   bool fAddRef=false
) throw( );
_com_error(
   const _com_error& that 
) throw( );

Parameters

• hr
  HRESULT information.

• perrinfo
  IErrorInfo object.

• bool fAddRef=false
  Causes the constructor to call AddRef on a non-null IErrorInfo interface. This provides for correct reference counting in the common case where ownership of the interface is passed into the _com_error object, such as:

  throw _com_error(hr, perrinfo);
  

  If you do not want your code to transfer ownership to the _com_error object, and the AddRef is required to offset the Release in the _com_error destructor, construct the object as follows:

  _com_error err(hr, perrinfo, true);
  

• that
  An existing _com_error object.

Remarks

The first constructor creates a new object given an HRESULT and optional IErrorInfo object. The second creates a copy of an existing _com_error object.

END Microsoft Specific

See Also

Concepts

_com_error Class