_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

• _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 encapsulate 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 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 is the method used by the wrapper functions in the type library headers to encapsulate and take ownership of a BSTR, returned by an interface method, in a _bstr_t object.

END Microsoft Specific

See Also

Concepts

_bstr_t Class