[support] How and where within Drupal do I call a hook?

[Fred Jones]

> How and where within Drupal do I call a hook?  As an example the
> openlayers module has a hook that I might be interested in calling
> called hook_openlayers_layers_info().

You write a module. Here you can Read the FM:
http://api.drupal.org/api/group/hooks/6 :)

That's the first result from Google under "drupal hook system"

F