[Chameleon] Add points

[Hector Perez]

Hello. I am developing an application with chameleon.
Until the moment it has seemed me an excellent tool. But I have a 
problem, I need to add a "point" to the map, in which the user will be 
able to put information that needs, these points must of being refernced 
by pixels within the map. I can't find  information or widget that can 
help me to do this.
Somebody could give me algun type of aid.?

 Thanks, Héctor Perez