error of riemann integrals!!!

what is an estimate of the error of the actual integral - the riemann sum.
$
∫f(x)dx - ∑f(Pk)h = e
" alt="
∫f(x)dx - ∑f(Pk)h = e
" /> where F(x) is evaluated from a to b and the sum is from k=1 to n. (sorry i dont know how to get the right symbols in here)

im thinking this e is the Maximum of f'(x) bc thats the error for one-dimentional taylor series, but i cant be sure...

any help!!?!?!?!