I'm not sure that I understand the Wiener measure in right way. Here's what I think.
Wiener measure is the measure on the classical wiener space C([0,1]) with sup norm. And it satisfies the properties of Wiener process or Brownian motion.(Like $B_t-B_s \sim N(0,t-s)$ )
My question is, what is the corresponding $\sigma$-algebra of Wiener measure on C([0,1])? Is it Borel $\sigma$-field? Or at least containing every open set of C([0,1]) ?