CString UTF8Convert(CString str, int sourceCodepage, int targetCodepage)
{
int len = str.GetLength();
int unicodeLen = MultiByteToWideChar(sourceCodepage, 0, str, -1, NULL, 0);
wchar_t* pUnicode = new wchar_t[unicodeLen + 1];
memset(pUnicode, 0, (unicodeLen + 1)*sizeof(wchar_t));
MultiByteToWideChar(sourceCodepage, 0, str, -1, (LPWSTR)pUnicode, unicodeLen);
BYTE* pTargetData = NULL;
int targetLen = WideCharToMultiByte(targetCodepage, 0, (LPWSTR)pUnicode, -1, (char*)pTargetData, 0, NULL, NULL);
pTargetData = new BYTE[targetLen + 1];
memset(pTargetData, 0, targetLen + 1);
WideCharToMultiByte(targetCodepage, 0, (LPWSTR)pUnicode, -1, (char*)pTargetData, targetLen, NULL, NULL);
CString rt;
rt.Format("%s", pTargetData);
delete pUnicode;
delete pTargetData;
return rt;
}