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589

answers:

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I've added a callback to an IHTMLElement instance but when the IDispatch::Invoke is called for the event, there are never any arguments (i.e. the pDispParams->cArgs and pDispParams->cNamedArgs are always 0). For example, I add a callback for an onmouseup event. From what I can tell, a callback for this event is supposed to receive a MouseEvent object. Is that correct? If so, what do I need to do to ensure this happens?

This is using the MSHTML for IE 6 sp2 (or better) on Windows XP SP2.

+2  A: 

Events arguments for all DOM events including onmouseup are stored in the parent window's event property (IHTMLWindow2::event)

If you don't already have the parent window cached, IHTMLElement has a document property which returns an IHTMLDocument interface. From that you can query for IHTMLDocument2 which has a parentWindow property. The IHTMLWindow2 that is returned has the event property you're looking for. You should be able to query for the event interface from there.

rpetrich
A: 

Ahh, OK! Does this work the same for the other events, like keydown/press/up, dragstart/end, and so on?

//edit

Yes it does - this works like a charm! Thanks !!!

Jim Crafton
Yeah, all event arguments that are accessed via the `event` object in javascript are accessed via IHTMLWindow2::event. I've updated my answer to reflect this
rpetrich