Best way to drag and drop ?

Hello Everybody,

I am designing a GUI that works mainly by dragging/dropping "clever" objects. I am seeking the "best way" to implement it by using Delphi. Could someone give me any clue on the most efficient way to handle between 500 - 1000 objects on the interface, allowing the user to chose one and act on it ?
I don't know :
- How I can make my obects appear on the interface (are they individually drawn, or everything is it implemented in some "draw" method ?)
- How an object will know when it will be selected and moved (the OnDrag /drop methods ?)

Thanks in advance for any bit of info,
Thierry

.

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