I had a run down of your control and figured out all the requirements i need using your control, except the most basic.  Following is what I am trying to do

If the zoom is =< 11 that means there is no point in plotting all the location points (pushpins) I simply just plot 1 point for every city.

This of course can be done easily from what i can see (havent tried it), where the real question is, how do i hook up a event to the pushpin clicks themselves so that when one of these pushpins for a city clicked, the map is zoomed to let say level 12 and all the pushpins for that city are loaded.

Also when indivisual pushpins are shown for each location I want to plot, I would like to simple be able to call a javascript function, where i can customize what happens (in this instance i will be showing a custom window with more details of the location, and the custom tooltip proviced when hovering over a pushpin is not enough and not customizable enough so thats why I would like functionality of firing a javascript function when a pushpin is clicked.

so to put it simple, pushpin clicks should be customizable to a javascript call where in on instance i zoom to another level, and at another instance i simply just display another custom window using a javascript call.

Thanks