/sys$common/syshlp/helplib.hlb CC, Run-time functions, wcstod  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Converts a given wide-character string to a double-precision
  number.

  Syntax:

       #include <wchar.h>

       double wcstod (const wchar_t *nptr, wchar_t **endptr);