Tool to view the contents of the Solution User Options file (.suo)

A bit late for the original poster, but maybe useful to others.

Two freeware viewers for structured storage files (including .suo-files):

https://github.com/ironfede/openmcdf (old URL: http://sourceforge.net/projects/openmcdf/)

http://www.mitec.cz/ssv.html (free for non-commercial use)

When you open a .suo file in one of these viewers, you will see streams related to:

• Bookmarks
• Debugger watches
• Unloaded projects
• Outlining
• Task-list user tasks
• Debugger exceptions
• Debugger Breakpoints
• Debugger find source data
• Open document windows

And much more...

I don't know any tool, but you can try to access user settings via IVsPersistSolutionOpts interface

The .SUO file is effectively disposable. If it's getting too large, just delete it. Visual Studio will create a fresh one.

If you do want to go poking around in it, it looks like an OLE Compound Document File. You should be able to use the StgOpenStorage function to get hold of an IStorage pointer.

I'm not aware of a tool, but you could write a Visual Studio extension to list the contents without too much work.

If you download the Visual Studio SDK, it has some straightforward examples that you can use. Find one that looks appropriate (like maybe the Toolwindow, if you want to give yourself a graphical display) and lift it (for your own personal use, of course).

What makes it easy is that the Package class which you implement in any VS extension, already implements the IVSPersistSolutionOpts, as aku mentioned. So you can just call the ReadUserOptions method on your package and inspect the contents.