Hello,
I revist this every now and then and are still no closer to getting it to work.
I want to extract the thumbnail from a file on windows using either win32com or
ctypes. As described in this link:
http://www.vbaccelerator.com/home/NE...on/article.asp
Has anyone implemented this? Or can explain how to do this. Basically it
involves calling IExtractImage from shell32. But I'm not sure how to get the
file object or access IExtractImage.
This is what I have so far (which doesn't work):
import win32com.client
Dispatch = win32com.client .Dispatch
objShell = Dispatch("Shell .Application");
objFolder = objShell.Namesp ace(0);
localPidl = objFolder.Parse Name('path\file name');
uio = objShell.GetUIO bjectOf(NULL, 1, localPidl,IID_I ExtractImage,NU LL,IExtract)
....
Based on the following C code:
"""
HBITMAP ExtractThumb(LP SHELLFOLDER psfFolder, LPCITEMIDLIST localPidl,
const SIZE* prgSize, DWORD dwRecClrDepth)
{
LPEXTRACTIMAGE pIExtract = NULL;
HRESULT hr;
hr = psfFolder->GetUIObjectOf( NULL, 1, &localPidl, IID_IExtractIma ge,
NULL, (void**)&pIExtr act);
if(NULL == pIExtract) // early shell version, thumbs not supported
return NULL;
OLECHAR wszPathBuffer[MAX_PATH];
DWORD dwPriority = 0; // IEI_PRIORITY_NO RMAL is defined nowhere!
DWORD dwFlags = IEIFLAG_SCREEN;
HBITMAP hBmpImage = NULL;
hr = pIExtract->GetLocation(ws zPathBuffer, MAX_PATH, &dwPriority,
prgSize, dwRecClrDepth, &dwFlags);
// even if we've got shell v4.70+, not all files support thumbnails
if(NOERROR == hr) hr = pIExtract->Extract(&hBmpI mage);
pIExtract->Release();
return hBmpImage; // callers should DeleteObject this handle after use
}
"""
regards,
Guy
