Hi all, I am considering to write a SolidWorks viewer. So I looked at the SolidWorks website for while, looking for API documentation or, better, documentation of the file format used to store SolidWorks. I found out that SolidWorks seems to use ParaSolid (how funny, they are owned by Dassault who owns the ACIS kernel and Catia also). So there is my first option, ParaSolid x_t and x_b are documented afaik. Now, I have never used SolidWorks, so my question to you experienced folks here is, what is the standard format that SW stores it's models in? And what am I going to miss when I use the ParaSolid format over the sldprt format? Any other suggestions? Pointers to libraries that already implement all of this? ;-) Thanks for any input. Roland __________________________________ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/