How can I combine several individual .ico files into a single file?

Question

I was able to convert PNG files into ICO files (thanks to http://superuser.com/q/62771/7878), but now I would like to create an icon "bundle" similar to system32.dll, which contains several individual icons. How can this be done?

Answer 1

You need to build a DLL that contains multiple icons as resources. That can be done from Visual Studio via these instructions. Other Windows development tools that can create a DLL should be able to do the same thing.

This could even been done with the resource compiler (rc.exe) that is included in the Windows SDK and manually creating a resource file.