Allocating and deleting memory

If i am declaring elements dynamically ie an array of ints or structures, etc. Is it best to allocate memory to the pointers through the onCreate event and delete them through the onDestroy event. Or....

To create them through the froms constructor, and delete them through the destructor?

Thanks for any feedback.

The second is a little more clean.

Right, so i guess there ain't much difference between the two methods.

Let the classes/objects handle their own memory.