Any luck in finding the documentation for sldtoolboxdata? Have you got any code examples?
No luck unfortunately, I ended up doing it all I wanted so far without dealing with sldtoolboxdata file. All I basically wanted is to automate the insertion of fasteners into assembly, multiple fasteners, different combinations, auto select lengths and sizes based on hole wizard holes. Works perfectly unless I choose a size or length which hasn't been previously created in the file, which is why I wanted to take this whole addin a step further, but still no luck on documentation. I'll try to contact someone at SolidWorks directly to see if they can help me out. Will let you know if I get anywhere.