how to load files saved as following formats into openGL application--need help!

how to import(load) “objects” into an OpenGL application that are saved in the following file format:
IGES(.igs),Neutral(.neu),STEP(.stp),STL(.stl),Inventor(.iv),
WaveFront(
.obj),Render(.slp),VRML(.wrl),ACIS File(.sat),
Assembly(
.asm).
Could you give me some examples or source codes ,or give me some clue about that?I need them in a hurry.Thank you very much! Please help me!

Hi !

find a library that can do it for you or write the code yourself.

You can use google to find lots of libraries for different formats, you could also have a peek att www.freshmeat.net and www.sourceforge.net

www.wotsit.org has information about many different file formats.

Mikael