hi, is someone know how to perform some volumetric light effect in real-time in opengl ? some links about tech or implementation code will be very usefull ....

See Nehe''s shadow tutorial... but instead of drawing an alpha-blended black quad over the entire screen, draw an alpha-blended quad the colour of your light.
Shadows are tricky and this implementation of volumetric light would be just as tricky.
There might be other ways... (one which I can think of is 3D textures representing light).