CComBSTR::CComBSTR

CComBSTR( );

CComBSTR( int nSize );

CComBSTR( int nSize, LPCOLESTR sz );

CComBSTR( int nSize, LPCSTR sz );

CComBSTR( LPCOLESTR pSrc );

CComBSTR( LPCSTR pSrc );

CComBSTR( const CComBSTR& src );

Parameters

nSize

[in] The number of characters to copy from sz.

sz

[in] A string to copy. The Unicode version specifies an LPCOLESTR; the ANSI version specifies an LPCSTR. Only nSize characters will be copied. The default value is NULL.

pSrc

[in] A string to copy. The Unicode version specifies an LPCOLESTR; the ANSI version specifies an LPCSTR.

src

[in] A CComBSTR object.

Remarks

The default constructor sets the m_str member to NULL. The copy constructor sets m_str to a copy of the BSTR member of src.

The other four constructors set m_str to a copy of the specified string; however, if you pass a value for nSize, then only nSize characters will be copied, followed by a terminating null character.

The destructor frees the string pointed to by m_str.

Example

CComBSTR bstr1;   // BSTR points to NULL
bstr1 = "Bye";    // initialize with assignment operator

OLECHAR* str = OLESTR("ta ta");  // wide char string of length 5
CComBSTR bstr2(wcslen(str));     // unitialized BSTR of length 5
wcscpy(bstr2.m_str, str);        // copy wide char string to BSTR

CComBSTR bstr3(5, OLESTR("Hello World")); // BSTR containing 'Hello', 
                                          // input string is wide char
CComBSTR bstr4(5, "Hello World");         // same as above, input string 
                                          // is ANSI

CComBSTR bstr5(OLESTR("Hey there")); // BSTR containing 'Hey there', 
                                     // input string is wide char
CComBSTR bstr6("Hey there");         // same as above, input string 
                                     // is ANSI

CComBSTR bstr7(bstr6);     // copy constructor, bstr7 contains 'Hey there'

CComBSTR Overview |  Class Members