Skip to content

bstr-t-operator-add-equal-plus.md

Latest commit

 

History

History
50 lines (33 loc) · 1.47 KB

bstr-t-operator-add-equal-plus.md

File metadata and controls

50 lines (33 loc) · 1.47 KB
description Learn more about: _bstr_t::operator +=, _bstr_t::operator +
title _bstr_t::operator +=, _bstr_t::operator +
ms.date 02/02/2021
f1_keywords
_bstr_t::operator+
_bstr_t::operator+=
helpviewer_keywords
+= operator [C++], appending strings
+ operator [C++], _bstr_t objects

_bstr_t::operator +=, _bstr_t::operator +

Microsoft Specific

Appends characters to the end of the _bstr_t object, or concatenates two strings.

Syntax

_bstr_t& operator+=( const _bstr_t& s1 );
_bstr_t operator+( const _bstr_t& s1 );
friend _bstr_t operator+( const char* s2, const _bstr_t& s1);
friend _bstr_t operator+( const wchar_t* s3, const _bstr_t& s1);

Parameters

s1
A _bstr_t object.

s2
A multibyte string.

s3
A Unicode string.

Remarks

These operators perform string concatenation:

  • operator+=( s1 ) Appends the characters in the encapsulated BSTR of s1 to the end of this object's encapsulated BSTR.

  • operator+( s1 ) Returns the new _bstr_t that's formed by concatenating this object's BSTR and the one in s1.

  • operator+( s2, s1 ) Returns a new _bstr_t that's formed by concatenating a multibyte string s2, converted to Unicode, and the BSTR encapsulated in s1.

  • operator+( s3, s1 ) Returns a new _bstr_t that's formed by concatenating a Unicode string s3 and the BSTR encapsulated in s1.

END Microsoft Specific

See also

_bstr_t class