My coworker and I have encountered a nasty situation where we have to use an active X control to manipulate a web camera on a page.
Is it possible to assign a javascript event handler to a button in the active x control so that it would fire an action on the page when clicked, or do we have to create a button on the html page itself that manipulates the Active X Control and then can fire any necessary actions on the page?
Please just use an existing ActiveX control. Like Flash or Silverlight. Flash has built-in webcam support and is controllable via JavaScript. Silverlight doesn't have built-in camera support, but it's JavaScript integration is fantastic.
If you must write your own then fret not, it is trivial to get it to interact with JavaScript. You just have to expose the IDispatch interface.
For events, you need to learn about Connection Points.