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String^ sSQL = "select * from container";
IntPtr sptr = ::Marshal::StringToHGlobalAnsi(sSQL);
void* stemp = sptr.ToPointer();
char* szSQL = static_cast<char*>(stemp);
String * sSQL = "select * from container";
IntPtr sptr = ::Marshal::StringToHGlobalAnsi(sSQL);
void* stemp = sptr.ToPointer();
char* szSQL = static_cast<char*>(stemp);
String str;
str.c_str()