hi,
whenever std::string is assigned to another std::string its giving me a memory leak,why is it so....generally std::string's destructor takes care of freeing it.......can anybody help me wht to do to avoid this type of memory leak...???

1)#define KP_PRODUCTTYPE _T("KeyPoint")
string ProductType = KP_PRODUCTTYPE;

Memory leak report:
---------- Block 3169 at 0x01DC4460: 16 bytes ----------
Call Stack:
f:\rtm\vctools\crt_bld\self_x86\crt\src\xmemory (44): std::_Allocate<char>
f:\rtm\vctools\crt_bld\self_x86\crt\src\xmemory (152): std::allocator<char>::allocate
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (1982): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Copy
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (2012): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Grow
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (1032): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (1043): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (893): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::operator=

also during...
2) IXMLDOMNode* pResultNode;
string AuthInfo = nXmlUtils::ReadString(pResultNode,"AuthenticationInformation");
here "AuthenticationInformation" is a tag from a xml file.

Memory leak report:

---------- Block 3158 at 0x01DC41D0: 16 bytes ----------
Call Stack:
f:\rtm\vctools\crt_bld\self_x86\crt\src\xmemory (44): std::_Allocate<char>
f:\rtm\vctools\crt_bld\self_x86\crt\src\xmemory (152): std::allocator<char>::allocate
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (1982): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Copy
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (2012): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Grow
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (1019): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (1006): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign
f:\rtm\vctools\crt_bld\self_x86\crt\src\xstring (888): std::basic_string<char,std::char_traits<char>,std::allocator<char> >::operator=

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