3,140 questions
0 answers
Overflow of FETCH Placeholder callback requests inside cloud filter api
Problem statement: We noticed that we intermittently get an error pop up on explorer: "Error 0x800701AA means "The cloud operation was not completed before the time-out period expired." for FETCH_PLACEHOLDERS callback for some folders (not…
Windows development | Windows API - Win32
asked
2026-11-05T18:50:54.2233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 75%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHU%3C/text%3E%3C/svg%3E)
Hangkun Ung
20
Reputation points
asked
2026-11-05T18:50:54.2233333+00:00
Hangkun Ung
20
Reputation points
0 answers
Windows AppContainer process fails to start with error 0xC0000142
I need help diagnosing a Windows application startup problem. A Python process exits with error 0xC0000142 (STATUS_DLL_INIT_FAILED) before it produces any output. A simple Python startup test fails with the same error in both an ordinary AppContainer and…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-05T17:57:43.16+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 9%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJB%3C/text%3E%3C/svg%3E)
jkrause berkeleyconstructors.com
21
Reputation points
1 answer
NtCreateFile: Supported API contract for secure handle-relative file and directory creation with reparse-point protection
Hello, I am designing a reusable security-sensitive Windows filesystem component and would appreciate clarification from Microsoft Windows Filesystem / Object Manager specialists regarding the officially supported API contract for creating files and…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-03T17:23:47.5566667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(272, 80%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPP%3C/text%3E%3C/svg%3E)
Pavel Poliak
0
Reputation points
commented
2026-11-05T15:18:25.1433333+00:00
Pavel Poliak
0
Reputation points
2 answers
Supported external association between active IME composition and its rendering window
Question We are building an external window-sharing tool. Which supported API combination associates a selected application's current input/composition context with its separate Microsoft IME preedit rendering HWND (or equivalent capturable surface),…
Windows development | Windows API - Win32
3,140 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 39%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EP%3C/text%3E%3C/svg%3E)
1 answer
Windows 11 26H2 (26300.9818): GetTcpTable2 returns state 0 for a verified listening socket
Windows_TCP_SyntheticResult.txtWindows 11 26H2 build 26300.9818: native IPv4 TCP tables report state 0 for a demonstrably listening synthetic socket Summary I observed an inconsistency between a socket owned by a small standalone Python program and the…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-04T18:05:29.1+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(284.8, 57.00000000000001%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPP%3C/text%3E%3C/svg%3E)
Pask Pask
0
Reputation points
edited a comment
2026-11-05T10:04:35.5533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(0, 47%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHN%3C/text%3E%3C/svg%3E)
Harry Nguyen (WICLOUD CORPORATION)
525
Reputation points Microsoft External Staff
Moderator
2 answers
Windows NTFS — Supported user-mode primitive for no-replace publication of an existing file
I'm researching a Windows application that writes and flushes a staged file, closes its handle, and then publishes the completed file under a destination pathname. The requirements are: Never replace an existing destination. Prevent competing publishers…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-28T14:00:40.3366667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 87%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESR%3C/text%3E%3C/svg%3E)
SkullyHIT Rios
0
Reputation points
commented
2026-11-05T09:42:48.1766667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(137.6, 34%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZN%3C/text%3E%3C/svg%3E)
Zack Nguyen (WICLOUD CORPORATION)
405
Reputation points Microsoft External Staff
Moderator
2 answers
SignTool in SDK BuildTools 10.0.28000.2957: cache-only verification and result evidence
Please identify existing, version-applicable documentation or an independently reviewed implementation record for SignTool distributed through Microsoft.Windows.SDK.BuildTools 10.0.28000.2957. We need clarification on two points before recommending…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-31T02:25:28.4366667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(48, 89%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPZ%3C/text%3E%3C/svg%3E)
Peter Zhang
0
Reputation points
commented
2026-11-05T09:40:02.4433333+00:00
Zack Nguyen (WICLOUD CORPORATION)
405
Reputation points Microsoft External Staff
Moderator
2 answers
Microsoft Software KSP: exact CNG signing ACE masks and protected DACL enforcement
We need provider-specific technical clarification for the Microsoft Software Key Storage Provider (Software KSP) regarding access control on persisted CNG signing keys. Scenario We intend to provision two separate LocalMachine ECDSA P-256 signing keys,…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-30T16:41:51.5+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 28.999999999999996%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGT%3C/text%3E%3C/svg%3E)
Goce Terziev
0
Reputation points
commented
2026-11-05T09:39:19.64+00:00
Zack Nguyen (WICLOUD CORPORATION)
405
Reputation points Microsoft External Staff
Moderator
2 answers
SetFileInformationByHandle FileRenameInfo returns WinError 87 for same-parent rename
I'm investigating a Windows Win32 file-rename operation using Python 3.13 ctypes. SetFileInformationByHandle with FileRenameInfo (class 3) returns 0, with immediate cached Windows error 87 (ERROR_INVALID_PARAMETER). The goal is to rename an inert…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-30T14:12:41.5433333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 2%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKR%3C/text%3E%3C/svg%3E)
Kyle Russell
0
Reputation points
commented
2026-11-05T06:22:03.7866667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(137.6, 91%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPN%3C/text%3E%3C/svg%3E)
Percy Nguyen (WICLOUD CORPORATION)
240
Reputation points Microsoft External Staff
Moderator
2 answers
Does user-mode NtCreateFile support OBJ_DONT_REPARSE with a directory RootDirectory handle?
I am developing a user-mode Windows application that needs to safely resolve file-system directory entries relative to a trusted parent directory handle, without following unapproved reparse points. I found a potential ambiguity between two Microsoft…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-31T09:12:07.5066667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 62%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
동석 이
0
Reputation points
commented
2026-11-05T06:21:01.0866667+00:00
Percy Nguyen (WICLOUD CORPORATION)
240
Reputation points Microsoft External Staff
Moderator
3 answers
GetTcpTable2 returns state 0; listener-only GetExtendedTcpTable returned FIN_WAIT_1 on Windows 11 26H2
On Windows 11 Pro 26H2 (previously observed build 26300.9818), x64, I cannot establish a consistent native TCP LISTEN ownership observation for Ollama 0.40.13 at 127.0.0.1:11434. I am asking about supported API semantics, not claiming a proven Windows or…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-30T23:32:17.3+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(176, 27%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAN%3C/text%3E%3C/svg%3E)
Arman Nehzomi
0
Reputation points
commented
2026-11-05T06:17:37.88+00:00
Percy Nguyen (WICLOUD CORPORATION)
240
Reputation points Microsoft External Staff
Moderator
1 answer
CFAPI / Shell: IFileOperation returns S_OK but leaves empty parent directories after deleting offline placeholders
Summary Deleting a populated cloud-placeholder directory tree through IFileOperation can return S_OK with GetAnyOperationsAborted == FALSE while leaving empty parent directories on disk. Files and leaf directories are removed, but several ancestors…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-04T12:52:40.1733333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(307.2, 12%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3E2H%3C/text%3E%3C/svg%3E)
229 ho
60
Reputation points
answered
2026-11-05T04:10:36.4266667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 52%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGL%3C/text%3E%3C/svg%3E)
Gatlin Le (WICLOUD CORPORATION)
1,385
Reputation points Microsoft External Staff
Moderator
2 answers
Can Windows Filtering Platform independently verify outbound firewall blocking without network traffic?
We are investigating a supported, read-only method to independently verify Windows Defender Firewall's effective outbound policy for a specific executable. We understand that Get-NetFirewallRule -PolicyStore ActiveStore provides the applicable firewall…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-25T09:54:06.01+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 40%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
אסף מנגוני
0
Reputation points
commented
2026-11-05T04:04:25.65+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 59%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETT%3C/text%3E%3C/svg%3E)
Tony Thach (WICLOUD CORPORATION)
1,445
Reputation points Microsoft External Staff
Moderator
2 answers
Supported user-mode NTFS directory flush and durability of newly published name bindings
Subject: Supported user-mode NTFS directory flush and durability of newly published name bindings We are evaluating the durability requirements of a local Windows application running as a standard, non-administrative user on NTFS. The application…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-02T06:30:09.2+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(38.4, 14.000000000000002%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPP%3C/text%3E%3C/svg%3E)
pepe papo
0
Reputation points
commented
2026-11-05T04:03:44.39+00:00
Tony Thach (WICLOUD CORPORATION)
1,445
Reputation points Microsoft External Staff
Moderator
2 answers
Supported non-administrative NTFS namespace durability after file replacement and directory creation
Supported non-administrative NTFS namespace durability after file replacement and directory creation Technical clarification request — Windows Filesystem / NTFS Dear Microsoft Windows Filesystem Engineering Team, We are developing a local, offline…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-02T07:27:25.8833333+00:00
pepe papo
0
Reputation points
commented
2026-11-05T04:03:06.0933333+00:00
Tony Thach (WICLOUD CORPORATION)
1,445
Reputation points Microsoft External Staff
Moderator
1 answer
Supported Windows DNS Client instrumentation for caller-to-result correlation
On supported Windows 11 releases, is there a documented extension point or provider contract that lets a diagnostic tool correlate a DNS request from an existing desktop process with the result returned through the shared Windows DNS Client resolver? Is…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-04T16:22:48.5366667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 64%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
落合 卓也
0
Reputation points
answered
2026-11-05T03:35:14.7366667+00:00
Gatlin Le (WICLOUD CORPORATION)
1,385
Reputation points Microsoft External Staff
Moderator
1 answer
CFAPI: CfCreatePlaceholders returns S_OK but creates corrupt placeholders (error 363)
Summary CfCreatePlaceholders can return S_OK, report all entries as processed, and set every per-item Result to S_OK while creating a placeholder that cannot subsequently be opened. CreateFileW then fails with ERROR_CLOUD_FILE_METADATA_CORRUPT (363 /…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-01T06:03:55.5266667+00:00
229 ho
60
Reputation points
edited a comment
2026-11-05T03:26:08.6333333+00:00
Harry Nguyen (WICLOUD CORPORATION)
525
Reputation points Microsoft External Staff
Moderator
2 answers
Supported five-DLL VCLibs deployment contract for a PyInstaller/PySide6 desktop MSIX
Hello, What is Microsoft's supported deployment contract for these five runtime DLLs in an x64, full-trust desktop MSIX containing two PyInstaller executables? msvcp140.dll msvcp140_1.dll msvcp140_2.dll vcruntime140.dll vcruntime140_1.dll Our proposed…
Windows development | Windows API - Win32
3,140 questions
asked
2026-10-31T15:58:41.1733333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 5%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPR%3C/text%3E%3C/svg%3E)
Prosanta Roy
0
Reputation points
commented
2026-11-05T03:22:42.81+00:00
Harry Nguyen (WICLOUD CORPORATION)
525
Reputation points Microsoft External Staff
Moderator
1 answer
Is NtCreateFile with RootDirectory race-safe against concurrent NTFS directory replacement?
We are developing a Windows backup application and need clarification regarding the supported security guarantees of directory-relative file opening on local NTFS volumes. Problem reproduced Our current implementation validates the source directory…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-03T00:46:37.38+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(153.6, 24%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPM%3C/text%3E%3C/svg%3E)
Pedro Miguel
0
Reputation points
commented
2026-11-05T03:21:58.62+00:00
Harry Nguyen (WICLOUD CORPORATION)
525
Reputation points Microsoft External Staff
Moderator
1 answer
Supported Win32 LPAC token verification before ResumeThread – Windows 11 26H2 (build 26300.9818)
Title: Supported Win32 LPAC token verification before ResumeThread – Windows 11 26H2 (build 26300.9818) Hello Microsoft Windows Development team, We are developing a security-sensitive Windows process-isolation controller and need to verify that a newly…
Windows development | Windows API - Win32
3,140 questions
asked
2026-11-03T11:25:05.4833333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(60.8, 49%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPL%3C/text%3E%3C/svg%3E)
Pål Bernhardsen
0
Reputation points
commented
2026-11-05T03:18:20.6366667+00:00
Harry Nguyen (WICLOUD CORPORATION)
525
Reputation points Microsoft External Staff
Moderator