_bstr_t::_bstr_t
The latest version of this topic can be found at _bstr_t::_bstr_t.
Microsoft Specific**
Constructs a _bstr_t object.
Syntax
_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