need some help about the collision

When the collision occurred
how to get the object's information(the be collision object)
For example:
A ball and a box to be collision
How to get the be collision objects's information
How to delete the be collision object

sorry for my poor english

thanks for help

Well you need to set up Materials for them before you start updating the world, then set a material callback for them in which Newton will call in the event of a collision. Then you can use the OgreNewt::Contact parameter to extract information and delete it if you wish.