[RESOLVED] DLLs: What functions they have, which ones are called by what program

[SLH]

I have a webcam which can be moved around (pan/tilt/zoom). The drivers give the option to do this, as well as when you're displaying an image from it (in any application) a little control window comes up, enabling you to move the cam or zoom in and out.

Someone has made a DLL that allows you to control its tilt and pan functions through an application. I want to make my own to allow for zooming too. Unfortunatly, i don't know how they did it, since the website with the source is down.

What i want to do is to try and work out how they got the functions etc. to call in that DLL.

Logitech has applications that allow you to control the cam, and has multiple DLLs in the same folder. I want to know what the app calls, or at least what functions (and parameters of said functions) are in each of those DLLs.

Thanks for any help!