I stumbled upon a tool that generates P/Invoke signatures for Microsoft's own unmanaged DLLs: PInvoke Interop Assistant
Is there a similar tool that will generate P/Invoke signatures for third-party unmanaged DLLs?
Alternately, any way to feed a third-party DLL to PInvoke Interop Assistant
EDIT: Actual issue I am trying to resolve
Google quickly found http://www.pinvoker.com/
Microsoft's C++/CLI compiler can also do this, if you use
#include the header file, it will generate p/invoke code which you can extract with e.g. ILSpy (free) or Red Gate Reflector (used to be free).