  Since November 2004, we attempt to detect GRB optical afterglows in near
real-time on images taken at the Canada France Hawaii Telescope within the Very
Wide Survey, component of the CFHT Legacy survey. To do so, a Real Time
Analysis System automatically and quickly analyzes MegaCAM images and extracts
from them a list of photometrically and astrometrically variable objects which
is then validated by a member of the collaboration. Each month, we repeatedly
observe 15 to 30 square degrees down to magnitude i' = 22.5. A few objects are
classified as candidates and analyzed more deeply, and statistics are done
showing the treatment's performance.
