This is a collapsible rollout widget for the FOX toolkit, like those used in 3DStudio MAX and available in the GLUI toolkit.
Download the source code and an example Win32 exe:
The code was built and tested on WinXP with MSVC 6.0, and FOX 1.1.46.
Should work with most any FOX 1.1.x version, but not with FOX 1.0.x.
If you have any problems, suggestions, patches let me know.
Also let me know if you find this useful!
Most of the functionality in this widget comes from Petri's hard work, but I've cleaned it up and made the API a little more flexible, and also tinkered with the looks and interaction so that it looks more like the equivalent 3DSMAX and GLUI rollout widgets, which are both very nicely done, in my opinion.
If you're interested in my other free code check here.
Finally, some screenshots!