How to get started with ActiveX control?

I've been given an under-documented 3rd party ActiveX control that I need to program into my asp.net web site (to run client-side in the browser). This would be my first time doing this and I don't know the first thing - how do I get started? I need to ensure that when users open our website, the ActiveX control automatically downloads to their browser, is this handled automatically by most browsers (most of my users are on ms internet explorer)?

Any and all guidance is appreciated!

Normally you'd want it packaged as a CAB file. Then you just have to create the proper <OBJECT> tag in the HTML, possibly with numerous <PARAM> tags.

Depending on the library you're working with here you might also have to create a proper License Package, which will then need its own <OBJECT> tag for the IE License Manager object.

See: http://support.microsoft.com/kb/159923