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    <blockquote> <p>Is there a way in my <code>ON_COMMAND</code> handler to get the <code>CMFCRibbonBaseElement*</code> that fired the event?</p> </blockquote> <p>Not directly, no. The <code>WM_COMMAND</code> message is sent from <code>CMFCRibbonBaseElement::NotifyCommand</code>, and this message doesn't include the pointer in its parameters.</p> <p>To be able to tell which Undo button was clicked from the <code>ON_COMMAND</code> handler, I wrote this class, which inherits <code>CMFCRibbonUndoButton</code>. What this code does is store a pointer to the last activated Undo button each time one of the buttons is clicked, or the popup menu activated.</p> <pre><code>// CMyMFCRibbonUndoButton.h class CMyMFCRibbonUndoButton : public CMFCRibbonUndoButton { DECLARE_DYNCREATE(CMyMFCRibbonUndoButton) public: CMyMFCRibbonUndoButton(); CMyMFCRibbonUndoButton(UINT nID, LPCTSTR lpszText, int nSmallImageIndex = -1, int nLargeImageIndex = -1); virtual void OnClick(CPoint point); virtual void OnShowPopupMenu(); static CMyMFCRibbonUndoButton* GetLastActivated(); private: static CMyMFCRibbonUndoButton* s_pLastActivated; }; // CMyMFCRibbonUndoButton.cpp IMPLEMENT_DYNCREATE(CMyMFCRibbonUndoButton, CMFCRibbonUndoButton) CMyMFCRibbonUndoButton* CMyMFCRibbonUndoButton::s_pLastActivated = NULL; CMyMFCRibbonUndoButton::CMyMFCRibbonUndoButton() { } CMyMFCRibbonUndoButton::CMyMFCRibbonUndoButton(UINT nID, LPCTSTR lpszText, int nSmallImageIndex, int nLargeImageIndex) : CMFCRibbonUndoButton(nID, lpszText, nSmallImageIndex, nLargeImageIndex) { } void CMyMFCRibbonUndoButton::OnClick(CPoint point) { s_pLastActivated = this; CMFCRibbonUndoButton::OnClick(point); } void CMyMFCRibbonUndoButton::OnShowPopupMenu() { s_pLastActivated = this; CMFCRibbonUndoButton::OnShowPopupMenu(); } CMyMFCRibbonUndoButton* CMyMFCRibbonUndoButton::GetLastActivated() { return s_pLastActivated; } </code></pre> <p>Use this class in place of <code>CMFCRibbonUndoButton</code> when initialising your ribbon bar. In your handler function, call <code>GetLastActivated()</code> to retrieve this pointer, for example:</p> <pre><code>void CMyTestDoc::OnEditUndo() { CMyMFCRibbonUndoButton* pUndoButton = CMyMFCRibbonUndoButton::GetLastActivated(); ASSERT_VALID(pUndoButton); if (pUndoButton != NULL) { int ActionNumber = pUndoButton-&gt;GetActionNumber(); // etc. } } </code></pre> <p>This is a bit of a hack, certainly, but it was about the only way I could find to solve the problem.</p> <p>Anyway, I hope this helps,</p> <p>Chris</p>
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    1. COThanks, but when MFC clones the undo button behind-the-scenes, it creates an ordinary CMFCRibbonUndoButton - not the derived class, so it never updates `s_pLastActivated` from the QAT button!
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    2. COInteresting, this code works nicely in my test application, and when MFC clones the button it creates a `CMyMFCRibbonUndoButton` object. MFC calls `GetRuntimeClass()->CreateObject()` on the button, so it should create an object of the right class.
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    3. COAh - I must've missed something - I'll try again.
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