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POBHO IE 9 Capture OnScroll Event if a site has the meta tag content="IE=9"
 

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  1. POBHO IE 9 Capture OnScroll Event if a site has the meta tag content="IE=9"
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    <p>I recently noticed that I'm unable to capture the OnSroll events of the "top" window in my BHO if I'm showing a page in IE9 and the page contais the tag: <code>&lt;meta http-equiv="X-UA-Compatible" content="IE=9"&gt;.</code></p> <p>I capture the scroll by sinking the DISPID_HTMLWINDOWEVENTS2_ONSCROLL of DIID_HTMLWindowEvents2 in the IHTMLWindow2 of the Top Document, and it works fine in all cases, except if the page contains that meta tag.</p> <p>My sink class is defined as:</p> <pre><code>class CIEPage : public IDispEventImpl&lt;1, CIEPage, &amp;DIID_HTMLDocumentEvents2, &amp;LIBID_MSHTML, 4, 0&gt;, public IDispEventImpl&lt;2, CIEPage, &amp;DIID_HTMLWindowEvents2, &amp;LIBID_MSHTML, 4, 0&gt; // SinkMap BEGIN_SINK_MAP(CIEPage) SINK_ENTRY_EX(1, DIID_HTMLDocumentEvents2, DISPID_HTMLELEMENTEVENTS2_ONMOUSEOVER, OnMouseOver) SINK_ENTRY_EX(2, DIID_HTMLWindowEvents2, DISPID_HTMLWINDOWEVENTS2_ONSCROLL, OnScroll) END_SINK_MAP() </code></pre> <p>And i'm sinking like this.</p> <pre><code>hr = IDispEventImpl&lt;1, CIEPage, &amp;DIID_HTMLDocumentEvents2, &amp;LIBID_MSHTML, 4, 0&gt;::DispEventAdvise(_spDocument); if(SUCCEEDED(hr)) _bAdvised[ListenerEventMouseOver] = true; if(IsTopPage()) { hr = _spDocument-&gt;get_parentWindow(reinterpret_cast&lt;IHTMLWindow2 **&gt;(&amp;_spWindow)); if (SUCCEEDED(hr) &amp;&amp; _spWindow) { hr = IDispEventImpl&lt;2, CIEPage, &amp;DIID_HTMLWindowEvents2, &amp;LIBID_MSHTML, 4, 0&gt;::DispEventAdvise(_spWindow); if(SUCCEEDED(hr)) _bAdvised[ListenerEventScroll] = true; } } </code></pre> <p>where _spDocument is a <code>CComPtr&lt;IHTMLDocument2&gt;</code> and _spWindow a <code>CComPtr&lt;IHTMLWindow2&gt;</code></p> <p>Any ideias? Also it seems to exist a mismatch in IE9 SDK headers and the documentation of msdn. For example the new document events of IE 9 in the <a href="http://msdn.microsoft.com/en-us/library/ff976251%28v=VS.85%29.aspx">documents</a> define many events that aren't available in the SDK. This is the definition in the mshtml.idl</p> <pre><code>[ hidden, uuid(30510737-98b5-11cf-bb82-00aa00bdce0b) ] dispinterface HTMLDocumentEvents4 { properties: methods: [id(DISPID_HTMLDOCUMENTEVENTS4_ONMSTHUMBNAILCLICK)] void onmsthumbnailclick([in] IHTMLEventObj* pEvtObj); [id(DISPID_HTMLDOCUMENTEVENTS4_ONMSSITEMODEJUMPLISTITEMREMOVED)] void onmssitemodejumplistitemremoved([in] IHTMLEventObj* pEvtObj); }; </code></pre> <p>Since, there is now according to the msdn a OnScrollEvent on a document, maybe it's that event that I need to sink if the browser is version 9 and the page contais the IE=9... but the SDK doesn't contain that information...</p> <p>Any help is appreciated. Thanks.</p>
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    1. USJoão Augusto
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    1. COAnswer can be found in this question http://stackoverflow.com/questions/9539410/ie9-fails-to-fire-onscroll-event-on-htmlwindow2-in-bho/9622382#9622382
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