wstring OS::GetOsVer(int&major_ver,int&minor_ver){wstring os_name;wstring ret;OSVERSIONINFOEX osvi;ZeroMemory(&osvi,sizeof(OSVERSIONINFOEX));osvi.dwOSVersionInfoSize=sizeof(OSVERSIONINFOEX);DWORD dwMajorVersion,dwMinorVersion,dwPlatformID;BOOL flag=(BOOL)GetVersionEx((OSVERSIONINFO*)&osvi);if(!