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_bstr_t::operator +=, +

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Microsoft Specific

_bstr_t& operator+=( const _bstr_t& s1 ) throw( _com_error );

_bstr_t operator+( const _bstr_t& s1 ) const throw( _com_error );

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 which is formed by concatenating this object’s BSTR with that of s1.
  • operator+( s2**,** s1 )   Returns a new _bstr_t which 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 which is formed by concatenating a Unicode string s3 with the BSTR encapsulated in s1.

END Microsoft Specific