Source code of Windows XP (NT5)
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// An IContextMenu on an array of context menus
HRESULT Create_ContextMenuOnContextMenuArray(IContextMenu* rgpcm[], UINT cpcm, REFIID riid, void** ppv);
// An IContextMenu on an existing HMENU
// NOTE: always takes ownership of the HMENU (in success and failure)
HRESULT Create_ContextMenuOnHMENU(HMENU hmenu, HWND hwndOwner, REFIID riid, void** ppv);
// An IContextMenu on an existing IContextMenu, which removes the ';'-separated list of verbs from the resulting menu
HRESULT Create_ContextMenuWithoutVerbs(IUnknown* punk, LPCWSTR pszVerbList, REFIID riid, void **ppv);
// CContextMenuForwarder is designed as a base class that forwards all
// context menu stuff to another IContextMenu implementation. You override
// whatever functions you want to modify. (Like QueryContextMenu - delegate then modify the results)
// For example, CContextMenuWithoutVerbs inherits from this class.
//
class CContextMenuForwarder : IContextMenu3, IObjectWithSite
{
public:
// IUnknown
STDMETHODIMP QueryInterface(REFIID riid, void **ppv);
STDMETHODIMP_(ULONG) AddRef(void) ;
STDMETHODIMP_(ULONG) Release(void);
// IContextMenu3
STDMETHODIMP QueryContextMenu(HMENU hmenu, UINT indexMenu,UINT idCmdFirst,UINT idCmdLast,UINT uFlags) { return _pcm->QueryContextMenu(hmenu,indexMenu,idCmdFirst,idCmdLast,uFlags); }
STDMETHODIMP InvokeCommand(LPCMINVOKECOMMANDINFO lpici) { return _pcm->InvokeCommand(lpici); }
STDMETHODIMP GetCommandString(UINT_PTR idCmd, UINT uType, UINT *pwReserved, LPSTR pszName, UINT cchMax) { return _pcm->GetCommandString(idCmd,uType,pwReserved,pszName,cchMax); }
// IContextMenu2
STDMETHODIMP HandleMenuMsg(UINT uMsg, WPARAM wParam, LPARAM lParam) { return _pcm2->HandleMenuMsg(uMsg,wParam,lParam); }
// IContextMenu3
STDMETHODIMP HandleMenuMsg2(UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *plResult) { return _pcm3->HandleMenuMsg2(uMsg,wParam,lParam,plResult); }
// IObjectWithSite
STDMETHOD(SetSite)(IUnknown *punkSite) { return _pows->SetSite(punkSite); }
STDMETHOD(GetSite)(REFIID riid, void **ppvSite) { return _pows->GetSite(riid,ppvSite); }
protected:
CContextMenuForwarder(IUnknown* punk);
virtual ~CContextMenuForwarder();
private:
LONG _cRef;
protected:
IUnknown* _punk;
IObjectWithSite* _pows;
IContextMenu* _pcm;
IContextMenu2* _pcm2;
IContextMenu3* _pcm3;
} ;