I wrote my locator class which grab features from my web service. I picked it up in the ArcMap and now I can perform a search in the geocoding toolbar. The suprise for me is the way results of gocoding are showed: green point for the first feature which has been found. How can I see information about found features? Where can I find other features? Where is the database used by locator? I can't find decent documentation about these issues. I use ArcGIS 10.0.
It's not entirely clear what your goal is. The place to start on how to create your own Locator is to from resources.arcgis.com. This should describe how you take data in your geodatabase and basically create the data structures to perform geocoding.
If you already have a Locator that you want to use (either provided online from arcgis.com or something you've created in a geodatabase with the above steps), you can use the ArcObjects API to retrieve results from the locator. Depending on which method you use, you can retrieve multiple results.