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CComBSTR::Append

Appends either lpsz or the BSTR member of bstrSrc to m_str.

HRESULT Append( 
   const CComBSTR& bstrSrc  
) throw( ); 
HRESULT Append( 
   wchar_t ch 
) throw( ); 
HRESULT Append( 
   char ch 
) throw( ); 
HRESULT Append( 
   LPCOLESTR lpsz  
) throw( ); 
HRESULT Append( 
   LPCSTR lpsz  
) throw( ); 
HRESULT Append( 
   LPCOLESTR lpsz, 
   int nLen  
) throw( );

bstrSrc

[in] A CComBSTR object to append.

ch

[in] A character to append.

lpsz

[in] A zero-terminated character string to append. You can pass a Unicode string via the LPCOLESTR overload or an ANSI string via the LPCSTR version.

nLen

[in] The number of characters from lpsz to append.

S_OK on success, or any standard HRESULT error value.

An ANSI string will be converted to Unicode before being appended.

enum { urlASP, urlHTM, urlISAPI } urlType;
urlType = urlASP;

CComBSTR bstrURL = OLESTR("http://SomeSite/");
CComBSTR bstrDEF = OLESTR("/OtherSite");
CComBSTR bstrASP = OLESTR("default.asp");

CComBSTR bstrTemp;
HRESULT hr;

switch (urlType)
{
case urlASP:
   // bstrURL is 'http://SomeSite/default.asp'
   hr = bstrURL.Append(bstrASP);
   break;

case urlHTM:
   // bstrURL is 'http://SomeSite/default.htm'
   hr = bstrURL.Append(OLESTR("default.htm"));
   break;

case urlISAPI:
   // bstrURL is 'http://SomeSite/default.dll?func'
   hr = bstrURL.Append(OLESTR("default.dll?func"));
   break;

default:
   // bstrTemp is 'http://'
   hr = bstrTemp.Append(bstrURL, 7);
   // bstrURL is 'http://OtherSite' 
   if (hr == S_OK)
       hr = bstrTemp.Append(bstrDEF);
   bstrURL = bstrTemp;

   break;
}

Header: atlbase.h

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