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_bstr_t::operator +=, +

Microsoft Specific

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

_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  
);

s1

A _bstr_t object.

s2

A multibyte string.

s3

A Unicode string.

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 is formed by concatenating this object's BSTR with that of s1.

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

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

END Microsoft Specific

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