エクスプローラで選択されているファイルのパスを取得するには？ (ID:73653)

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IDispatch とコネクションポイントを使うようです。

#import <shell32.dll>
#import <shdocvw.dll>

#include <vector>

class CTest : public Shell32::DShellFolderViewEvents
{
public:

virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppv)
    {
        if (iid == __uuidof(IUnknown))
        {
            _RPT0(_CRT_WARN, "IUnknown\n");

*(IUnknown**)ppv = this;

return S_OK;
        }

if (iid == __uuidof(IDispatch))
        {
            _RPT0(_CRT_WARN, "IDispatch\n");

*(IDispatch**)ppv = this;

return S_OK;
        }

return E_FAIL;
    }

virtual ULONG STDMETHODCALLTYPE AddRef()
    {
        _RPT0(_CRT_WARN, "CTest::AddRef()\n");

return 1;
    }

virtual ULONG STDMETHODCALLTYPE Release()
    {
        _RPT0(_CRT_WARN, "CTest::Release()\n");

return 0;
    }

virtual HRESULT STDMETHODCALLTYPE GetTypeInfoCount( 
        /* [out] */ UINT *pctinfo){ return E_FAIL; }
    
    virtual HRESULT STDMETHODCALLTYPE GetTypeInfo( 
        /* [in] */ UINT iTInfo,
        /* [in] */ LCID lcid,
        /* [out] */ ITypeInfo **ppTInfo){ return E_FAIL; }
    
    virtual HRESULT STDMETHODCALLTYPE GetIDsOfNames( 
        /* [in] */ REFIID riid,
        /* [size_is][in] */ LPOLESTR *rgszNames,
        /* [in] */ UINT cNames,
        /* [in] */ LCID lcid,
        /* [size_is][out] */ DISPID *rgDispId){ return E_FAIL; }
    
    virtual /* [local] */ HRESULT STDMETHODCALLTYPE Invoke( 
        /* [in] */ DISPID dispIdMember,
        /* [in] */ REFIID riid,
        /* [in] */ LCID lcid,
        /* [in] */ WORD wFlags,
        /* [out][in] */ DISPPARAMS *pDispParams,
        /* [out] */ VARIANT *pVarResult,
        /* [out] */ EXCEPINFO *pExcepInfo,
        /* [out] */ UINT *puArgErr)
    {
        _RPT1(_CRT_WARN, "CTest::Invoke(0x%08X)\n", dispIdMember);

if (dispIdMember == 0xC8)
        {
            SelectionChanged();
        }

return E_FAIL;
    }

public:

CTest(const Shell32::IShellFolderViewDualPtr& shellFolderView)
    {
        _RPT0(_CRT_WARN, "CTest::CTest()\n");

m_shellFolderView = shellFolderView;

IConnectionPointContainerPtr cpc = m_shellFolderView;
        IConnectionPointPtr cp; cpc->FindConnectionPoint(__uuidof(Shell32::DShellFolderViewEvents), &cp);

cp->Advise(this, &m_cookie);
    }

virtual ~CTest()
    {
        _RPT0(_CRT_WARN, "CTest::~CTest()\n");

IConnectionPointContainerPtr cpc = m_shellFolderView;
        IConnectionPointPtr cp; cpc->FindConnectionPoint(__uuidof(Shell32::DShellFolderViewEvents), &cp);

cp->Unadvise(m_cookie);
    }

void CTest::SelectionChanged()
    {
        _RPT0(_CRT_WARN, "CTest::SelectionChanged\n");

Shell32::FolderItemsPtr folderItems = m_shellFolderView->SelectedItems();

long count = folderItems->Count;

_RPT1(_CRT_WARN, "count = %d\n", count);

for (long i = 0; i < count; i++)
        {
            Shell32::FolderItemPtr folderItem = folderItems->Item(i);

_RPT1(_CRT_WARN, "path = %s\n", (LPCTSTR)folderItem->Path);
        }
    }

private:

Shell32::IShellFolderViewDualPtr m_shellFolderView;
    DWORD m_cookie;

};

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    ::CoInitialize(0);

try
    {
        std::vector<CTest*> testContainer;

SHDocVw::IShellWindowsPtr shellWindows(__uuidof(SHDocVw::ShellWindows));

long count = shellWindows->Count;

_RPT1(_CRT_WARN, "count = %d\n", count);

for (long i = 0; i < count; i++)
        {
            SHDocVw::IWebBrowser2Ptr webBrowser = shellWindows->Item(i);
            Shell32::IShellFolderViewDualPtr shellFolderView = webBrowser->Document;

if ((bool)shellFolderView)
            {
                CTest* test = new CTest(shellFolderView);

testContainer.push_back(test);
            }
        }

::MessageBox(0, TEXT("Test"), TEXT("Test"), MB_OK);

for (i = 0; i < (long)testContainer.size(); i++)
            delete testContainer[i];
    }
    catch (_com_error& e)
    {
    }

::CoUninitialize();

return 0;
}

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