Question: I have a C++ DLL which was written in 1998, and I want to view the members (properties, fields, methods, constructors etc). I am of the understanding that the company who wrote the DLL is no longer about, but it is still used.

If I have only the DLL, is this possible? Or do you have to just know what is inside the DLL to work with it. If it is possible how would I go about this?

I am looking to work with the DLL from .Net via P/Invoke.

Answer: 
You can use a tool like [IDA](http://www.hex-rays.com/products/ida/index.shtml) to dissasemble the binary and try to make out function names, but this can be hard. Why do you only have the DLL? It would be much easier to get the info from the export table of the associated lib or, even better, header files.
you can use VS Command prompt
a simple command is:

```
dumpbin /exports <nameofdll>

```