how do I set the shape of the sprite ? and how to solve the collision between two sprites?

Halley, are you using physics or ordinary sprite collision?

Also what do you mean by "solve the collision"?

ordinary sprite collision.

I mean there is a animation about a people. the people in different images has different position. because it's a jumping animation. I didn't control the jumping of people by program. the artists make the jumping process of a people.

I am afraid that the different position of the different images will take vision mistakes when the sprite hit the bullets.

Have you tried using "SetSpriteShape(iSpriteIndex,3)" each time you change the image? Not sure how fast it is but it might re-calculate the sprite boundaries...?

No, I think what you said is a good advice .I'll try it.