  In this work, we explore the possibility of using the Wesenheit function to
derive individual distances to Galactic Cepheids, as the dispersion of the
reddening free Wesenheit function is smaller than the optical period-luminosity
(P-L) relation. When compared to the distances from various methods, the
averaged differences between our results and published distances range from
-0.061 to 0.009, suggesting that the Wesenheit function can be used to derive
individual Cepheid distances. We have also constructed Galactic P-L relations
and selected Wesenheit functions based on the derived distances. A by-product
from this work is the derivation of Large Magellanic Cloud distance modulus
when calibrating the Wesenheit function. It is found to be 18.531 \pm 0.043
mag.
