private: static int & __ptr64 __cdecl std::ios_base::_Index_func(void)

Mangled name

?_Index_func@ios_base@std@@CAAEAHXZ

Exported by

size	filename	version
853312	msvcp90.dll	9.00.30729.4148
245760	msvcm90.dll	9.00.30729.4148