_bstr_t::_bstr_t

Microsoft Specific

Constructs a _bstr_t object.

_bstr_t( ) throw( ); 
_bstr_t(
   const _bstr_t& s1 
) throw( );
_bstr_t(
   const char* s2 
);
_bstr_t(
   const wchar_t* s3 
);
_bstr_t(
   const _variant_t& var 
);
_bstr_t(
   BSTR bstr,
   bool fCopy 
);

Parameters

• s1
  A _bstr_t object to be copied.

• s2
  A multibyte string.

• s3
  A Unicode string

• var
  A _variant_t object.

• bstr
  An existing BSTR object.

• fCopy
  If false, the bstr argument is attached to the new object without making a copy by calling SysAllocString.

Remarks

The following table describes the _bstr_t constructors.

Constructor	Description
_bstr_t( )	Constructs a default _bstr_t object that encapsulates a null BSTR object.
_bstr_t( _bstr_t& s1 )	Constructs a _bstr_t object as a copy of another. This is a shallow copy, which increments the reference count of the encapsulated BSTR object instead of creating a new one.
_bstr_t( char* s2 )	Constructs a _bstr_t object by calling SysAllocString to create a new BSTR object and then encapsulates it. This constructor first performs a multibyte to Unicode conversion.
_bstr_t( wchar_t* s3 )	Constructs a _bstr_t object by calling SysAllocString to create a new BSTR object and then encapsulates it.
_bstr_t( _variant_t& var )	Constructs a _bstr_t object from a _variant_t object by first retrieving a BSTR object from the encapsulated VARIANT object.
_bstr_t( BSTR bstr, bool fCopy )	Constructs a _bstr_t object from an existing BSTR (as opposed to a wchar_t* string). If fCopy is false, the supplied BSTR is attached to the new object without making a new copy with SysAllocString. This constructor is used by wrapper functions in the type library headers to encapsulate and take ownership of a BSTR that is returned by an interface method.

END Microsoft Specific

See Also

Reference

_bstr_t Class

_variant_t Class