Eryk Sun added the comment:
Thanks, Steve. I manually added this shell extension as the drop handler for
Python.File. It's working with non-ANSI filenames, e.g. "αβψδ εφγη ιξκλ μνοπ
ρστθ ωχυζ.txt" in a Western locale. Also, I was able to drop 939 files from the
System32 directory, with a total command-line length of 32766 characters.
However, I ran into heap corruption that crashed Explorer when dropping files
from "C:\Program Files (x86)\Windows Kits\10\Include\10.0.10586.0\um". I used
gflags to enable the page heap for Explorer and tracked the problem down to
FilenameListCchLength[W|A]. It wasn't allocating space for the double quotes
for paths with spaces in them. So I made the following changes:
FilenameListCchLengthW:
length += oneLength + (wcschr(pszSource, L' ') ? 3 : 1);
FilenameListCchLengthA:
length += oneLength + (strchr(pszSource, ' ') ? 3 : 1);
After this I was able to drop 421 files from the above-mentioned Include
directory, with a total command-line length of 32737 characters.
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