C++ MFC 从 CLSID (GUID) 创建 IShellItem

Question

我必须为 Windows 帮助和 Windows 运行创建一个 ShellItem...

我有这个

Help and Support    {2559a1f1-21d7-11d4-bdaf-00c04f60b9f0}
Run {2559a1f3-21d7-11d4-bdaf-00c04f60b9f0}

来自 http://www.sevenforums.com/tutorials/110919-clsid-key-list-windows-7-a.html

我试过了

IShellFolder* desk = NULL;
HRESULT hr =SHGetDesktopFolder(&desk);
LPITEMIDLIST pidl2=NULL;
            ULONG cbEaten;
            DWORD dwAttribs = 0 ;

            hr = desk->ParseDisplayName(NULL,
                                         NULL,
                                         L"::{2559A1F1-21D7-11D4-BDAF-00C04F60B9F0}",
                                     &cbEaten,  // This can be NULL
                                         &pidl2,
                                         &dwAttribs);

它返回 OK 但 Null 作为 pidl2

你们能帮帮我吗？

Answer 1

如果您传递“shell:::{2559a1f3-21d7-11d4-bdaf-00c04f60b9f0}”，ParseDisplayName 应该能够解析它，但我想这并不是您真正想要的。

ParseDisplayName 能够解析某些::{clsid} 路径，但我认为它仅限于一组非常有限的 CSIDL_* 特殊文件夹。 SHSimpleIDListFromPath 能够解析它。

如果你真的想用 ParseDisplayName 解析它，你可以尝试模拟 SHSimpleIDListFromPath:

class EmptyFileSystemBindData : public IFileSystemBindData {
public:
    STDMETHODIMP QueryInterface(REFIID riid, void **ppv)
    {
        if (riid == IID_IUnknown || riid == IID_IFileSystemBindData) {
            *ppv = static_cast<IUnknown*>(this);
            AddRef();
            return S_OK;
        }
        *ppv = NULL; return E_NOINTERFACE;
    }
    STDMETHODIMP_(ULONG) AddRef() { return 2; }
    STDMETHODIMP_(ULONG) Release() { return 1; }
    STDMETHODIMP SetFindData(const WIN32_FIND_DATAW *pfd) 
    {
        return S_OK;
    }
    STDMETHODIMP GetFindData(WIN32_FIND_DATAW *pfd)
    {
        ZeroMemory(pfd,sizeof(WIN32_FIND_DATAW));
        return S_OK;
    }
};

LPITEMIDLIST pidl2=NULL;
HRESULT hr;
IShellFolder*psf;
IBindCtx*pbc;
hr = CreateBindCtx(0,&pbc);
EmptyFileSystemBindData efsbd;
if (SUCCEEDED(hr))
{
    BIND_OPTS bo = {sizeof(bo)};
    bo.grfMode = STGM_CREATE;
    hr = pbc->RegisterObjectParam(STR_FILE_SYS_BIND_DATA,&efsbd);
    if (SUCCEEDED(hr) && 0==pbc->SetBindOptions(&bo))
    {
        hr = SHGetDesktopFolder(&psf);
        if (SUCCEEDED(hr))
        {
            hr = psf->ParseDisplayName(0,pbc,L"::{2559a1f3-21d7-11d4-bdaf-00c04f60b9f0}",0,&pidl2,0);
            if (SUCCEEDED(hr))
            {
                OutputDebugStringA("parsed ok\n");
                ILFree(pidl2);
            }
            psf->Release();
        }
    }
    pbc->Release();
}