std::string SystemStringToStdString( System::String^ sData )
{
int q=(int)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(sData);
char* p=(char*)q;
return std::string(p);
}
System::String^ stdStringtoSystemString(std::string sData)
{
System::String^ sResult = System::Runtime::InteropServices::Marshal::PtrToStringAnsi(System::IntPtr((void*)sData.c_str()));
return sResult;
}