Hello I heard Sprite Engine (DelphiX component) doesn''t work well (expecially for lots of images loaded at run-time) and that it is better to implement your own... It seems harder. What do you think? Have you heard about UnDelphiX? What advantages it has? Thanks very much. David.

Yes, SpriteEngine is not working well.
And it is better to implement your own,
because you will get much better performance.

UnDelphiX has every minor advantages:
1) uses common DirectX headers
2) passes pointers to TRects that values, which are
slightly faster.

Also, if you want to use UnDelphiX in Delphi6 you will
need to do some corrections.
It takes about 15 minutes, but very boring...