Platform SDK Shell, Drag/Drop from Filesystem

Is there a way to get the name (or path) of the source folder when a
drag/drop is initiated from the file system? What

I mean by this is I want the name of the source folder when I drag/drop
items from the file system into my NSE.

Thanks!

-Bill

If you have IContextMenu implemented with the IShellExtInit interface,
the IShellExtInit::Initialize gets called with the source and destination
of the items dragged.

From reading about IShellExtInit on MSDN, the arguments to Initialize are:

pidlFolder - For nondefault drag-and-drop menu extensions, specifies the
target folder
pdtobj - specifies the objects being acted upon
hkeyProgID - registry key for the file object or folder type

So it doesn't seem as this would be of much use...nevermind the fact that
though it is implemented in my IContextMenu implementation, it never gets
called from what I can tell.

try with this:

STDMETHODIMP CContextMenu::Initialize(LPCITEMIDLIST pidlFolder, LPDATAOBJECT
lpdobj, HKEY hkeyProgID)
{
DWORD dwErrcode = 0L;
FORMATETC fe;
STGMEDIUM stgmed;

fe.cfFormat = CF_HDROP;
fe.ptd = NULL;
fe.dwAspect = DVASPECT_CONTENT;
fe.lindex = -1;
fe.tymed = TYMED_HGLOBAL;

// Get the storage medium from the data object.
HRESULT hr = lpdobj->GetData(&fe, &stgmed);
m_arrFileNames.RemoveAll();
if (SUCCEEDED(hr))
{
if(stgmed.hGlobal)
{
int iSize = 0;
LPDROPFILES pDropFiles = (LPDROPFILES)GlobalLock(stgmed.hGlobal);

LPTSTR pszFiles = NULL, pszTemp = NULL;
LPWSTR pswFiles = NULL, pswTemp = NULL;

if (pDropFiles->fWide)
{
pswFiles = (LPWSTR) ((BYTE*) pDropFiles + pDropFiles->pFiles);
pswTemp = (LPWSTR) ((BYTE*) pDropFiles + pDropFiles->pFiles);
m_arrFileNames.Add(_bstr_t(pswFiles));
}
else
{
pszFiles = (LPTSTR) pDropFiles + pDropFiles->pFiles;
pszTemp = (LPTSTR) pDropFiles + pDropFiles->pFiles;
m_arrFileNames.Add(pszFiles);
}
}
GlobalUnlock(stgmed.hGlobal);
ReleaseStgMedium(&stgmed);
}
else
dwErrcode = GetLastError();

return NOERROR;
}

I think that gets the list of files you're dragging, not the folder you're
dragging them from.

I've already implemented that in my implementation of IDropTarget.

IShellView::GetItemObject( SVGIO_SELECTION...
will give you the IDataobject for the item that your selected .

This item can be a file, a folder or a combination of the two.

IContextMenu with IShellExtInit::Initialize gives you this IDataObject
with no effort.

IContextMenu only gets called if you are dragging something into or out of
your namespace.

You can still get the above with IShellView::GetItemObject. You first
have to locate the window with the active view. You obtain the IShellView
through the IShellBrowser interface.

How about if you look at the CFSTR_SHELLIDLIST data? The first item in the CIDA represents the containing folder.

--
Jim Barry, MVP for Windows SDK

In that case I believe the containing folder is the desktop and the ID-lists are relative to that. (Which of course means that the ID-lists are fully qualified.)

--
Jim Barry, MVP for Windows SDK