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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 stringvar
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