_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