2,895 questions with Windows development | Windows API - Win32 tags

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Will using RegisterHotKey in a WinUI 3 packaged app pass Microsoft Store certification?

Hello, I am currently developing a WinUI 3 packaged app that I plan to distribute through the Microsoft Store. My app would benefit from global keyboard shortcuts, and I am considering using the Win32 API RegisterHotKey to implement this…

Windows development | Windows API - Win32
asked 2025-12-06T13:05:03.7066667+00:00
Grape Juice 0 Reputation points
commented 2025-12-19T11:37:04.84+00:00
Harry Vo (WICLOUD CORPORATION) 3,825 Reputation points Microsoft External Staff Moderator
1 answer

Protected registry keys?

Hello, I prepared some Windows customization scripts to save time on each install, recently, some registry keys seem to get protected, while they are not sensitive security areas, simply desktop customization keys per user, few…

Windows development | Windows API - Win32
asked 2025-11-27T23:37:49.7266667+00:00
Halifax Crosby 140 Reputation points
commented 2025-12-19T10:10:37.14+00:00
Harry Vo (WICLOUD CORPORATION) 3,825 Reputation points Microsoft External Staff Moderator
1 answer

Update app from code

Hello https://xtls-v4.hkg1.meaqua.org/en-us/windows/msix/store-developer-package-update Is it possible to check if an update is available, and download/install it in .Net Framework WinForms apps? (full trust store packaged) Thanks in advance.

Windows development | Windows API - Win32
asked 2025-12-02T13:27:03.8766667+00:00
Halifax Crosby 140 Reputation points
edited a comment 2025-12-18T06:07:01.25+00:00
Michael Le (WICLOUD CORPORATION) 7,700 Reputation points Microsoft External Staff Moderator
1 answer

Help Parsing Long Integer from Input in Win32 API (Possible Error?)

System.InvalidOperationException: Operation failed with error code 18884001969 at MyApp.Controllers.PaymentController.ProcessRequest() in /src/Controllers/PaymentController.cs:line 229 System.InvalidOperationException: Operation failed with error code…

Windows development | Windows API - Win32
asked 2025-11-25T15:58:51.32+00:00
Lekisha Abeita 0 Reputation points
commented 2025-12-18T02:58:50.5966667+00:00
Harry Vo (WICLOUD CORPORATION) 3,825 Reputation points Microsoft External Staff Moderator
1 answer

CredentialsChanged() is failing with error -2147019873 in CredentialProvider

We are using CredentialProvider in C++ for Windows, On calling OnCredentialsChanged(), Sometimes CredentialsChanged() is failing with HRESULT hr -2147019873.

Windows development | Windows API - Win32
asked 2025-12-17T07:10:19.04+00:00
SHARVANI ATCHULA 0 Reputation points
edited the question 2025-12-17T16:33:40.37+00:00
Mike Bowen 2,056 Reputation points Microsoft Employee Moderator
1 answer

assembly error

An error occurred while signing: Failed to sign bin\Release\app.publish\PrestonTrans.exe. SignTool Error: No certificates were found that met all the given criteria.

Windows development | Windows API - Win32
asked 2025-09-07T13:33:51.7833333+00:00
ron desanti 0 Reputation points
commented 2025-12-16T09:55:32.4766667+00:00
Harry Vo (WICLOUD CORPORATION) 3,825 Reputation points Microsoft External Staff Moderator
1 answer

Is it possible in cmd to set the character cell size to exactly 1x1 pixels?

Hello, I am experimenting with cmd and I would like to know if it is possible to configure the console font so that each character cell is rendered as exactly 1x1 pixels. I have already tried several approaches, but none of them achieved this goal: …

Windows development | Windows API - Win32
asked 2025-12-10T21:06:49.4366667+00:00
Anton Sumak 0 Reputation points
commented 2025-12-16T08:06:57.5566667+00:00
Harry Vo (WICLOUD CORPORATION) 3,825 Reputation points Microsoft External Staff Moderator
2 answers

Can I link to the MFC 11 toolset in Visual Studio 2022?

I am trying to get some legacy code building in VS 2022 as a first step toward future maintainability. This code links to a third-party library that uses MFC. The newest version of that third-party library that is available links to version 11 of MFC…

Windows development | Windows API - Win32
asked 2025-12-15T21:47:22.7633333+00:00
Wayne Steinhour 0 Reputation points
answered 2025-12-16T07:44:34.32+00:00
Michael Le (WICLOUD CORPORATION) 7,700 Reputation points Microsoft External Staff Moderator
3 answers

4625- Security Microsoft Unified Security Protocol Provider SChannel

While calling sslStream.AuthenticateAsServer(this.serverCertificate, true, SslProtocols.Tls12, false) method throwing below Audit information error An account failed to log on. Subject: Security ID: NULL SID Account Name: - Account Domain: - Logon…

Windows development | Windows API - Win32
asked 2025-12-08T04:59:32.35+00:00
Radhika Sridhar 20 Reputation points
commented 2025-12-12T19:01:43.8333333+00:00
David AVILA 5 Reputation points
2 answers

How Do I Retarget a C++ Application?

Hello Folks: Developing on Windows 10 Pro on the Extended Security Update program, VS 2019 Community Version 16.11.53, all C++. I'm getting the following error. error MSB8020: The build tools for v143 (Platform Toolset = 'v143') cannot be…

Windows development | Windows API - Win32
asked 2025-12-02T16:49:16.36+00:00
Larry 20 Reputation points
commented 2025-12-12T08:02:42.1433333+00:00
Jay Pham (WICLOUD CORPORATION) 3,310 Reputation points Microsoft External Staff Moderator
1 answer

Is the MsRdpClient11NotSafeForScripting::SendKeys() method broken or disabled on Windows11? All the other API calls work except this one. I am bit encoding the fields for the lParam, and have tried both bool and VARIANT_BOOL to indicate keys up/down.

I am using the MsRdpClient11NotSafeForScripting class to write a C++ RDP client. All the other needed functions/methods work except SendKeys(). I need to know if it is known broken / disabled on Windows 11 method broken or disabled on Windows11? I use a…

Windows development | Windows API - Win32
asked 2025-11-05T06:46:05.5233333+00:00
R Hartley 0 Reputation points
commented 2025-12-11T05:35:31.0933333+00:00
R Hartley 0 Reputation points
2 answers One of the answers was accepted by the question author.

Is There a Practical Size/Page Limit for Print Spooling in Win32 Printing?

I'm building a WinUI2 (WinRT/C++) application that includes a custom printing workflow. Instead of relying on the system-provided Printer Dialog, we're generating our own UI and sending print jobs directly using Win32 APIs. To print, I'm obtaining the…

Windows development | Windows API - Win32
asked 2025-12-04T07:12:48.4233333+00:00
Shyam Butani 445 Reputation points
accepted 2025-12-10T12:36:35.8666667+00:00
Shyam Butani 445 Reputation points
2 answers

rescap Capability

Hello My .NET Framework WinForms msix packaged app has declared runFullTrust Capability. It works fine on my end when accessing the Internet to send/receive data. But I've seen many similar apps on the store that declare both runFullTrust and…

Windows development | Windows API - Win32
asked 2025-12-08T17:36:30.2433333+00:00
Halifax Crosby 140 Reputation points
edited an answer 2025-12-09T13:58:32.9966667+00:00
Darran Rowe 2,531 Reputation points
2 answers

How to obtain information about CPU, RAM, GPU

I have been making a small tool recently One of the functions requires obtaining the current CPU, RAM, GPU usage rate of the system How can I currently obtain the usage rate of CPU, RAM, and GPU? Are there any APIs available? My tool is compatible with…

Windows development | Windows API - Win32
asked 2025-06-09T09:32:24.4133333+00:00
zhang_wang_hong 3,910 Reputation points Volunteer Moderator
commented 2025-12-09T12:54:47.8733333+00:00
zhang_wang_hong 3,910 Reputation points Volunteer Moderator
1 answer One of the answers was accepted by the question author.

msix Registry.dat usage

Hello My desktop Framework WinForms packaged app has a Registry.dat to have some preloaded entries. However, adding these keys to my Registry.dat which only packaged app has access to it, will have any effect? Thanks. HKLM\SOFTWARE\Microsoft\Internet…

Windows development | Windows API - Win32
asked 2025-12-08T17:45:56.73+00:00
Halifax Crosby 140 Reputation points
commented 2025-12-09T06:44:27.13+00:00
Jack Dang (WICLOUD CORPORATION) 6,305 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

How to download CertPurge?

Hello I need to download the CertPurge: https://techcommunity.microsoft.com/blog/coreinfrastructureandsecurityblog/pki-basics-how-to-manage-the-certificate-store/259419 But I get AuthorizationFailure error, how to get it? Thanks in advance.

Windows development | Windows API - Win32
asked 2025-12-02T13:21:01.2166667+00:00
Halifax Crosby 140 Reputation points
accepted 2025-12-09T06:12:36.3533333+00:00
Halifax Crosby 140 Reputation points
1 answer

Program crash when creating MagnificationAPI window in Windows 11

While executing the following statement, programs on the target computer crash without warning and without a runtime error pop-up box. hwndMag = CreateWindow(WC_MAGNIFIER, TEXT("IdtScreenMagnifierMag"), WS_CHILD | MS_CLIPAROUNDCURSOR |…

Developer technologies | C++
Developer technologies | C++
A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
4,028 questions
Windows development | Windows API - Win32
asked 2024-07-05T04:07:40.6+00:00
RL Chen 265 Reputation points
commented 2025-12-09T05:17:17.6166667+00:00
RL Chen 265 Reputation points
1 answer

Automatic launch of non-UWP application in kiosk mode with autologon

I created an executable (app.exe) that needs to be started automatically on a kiosk-mode workstation with autologon enabled. Issues encountered: app.exe does not run correctly under non-administrator accounts: the launch fails or the application freezes…

Windows development | Windows API - Win32
asked 2025-11-08T23:10:33.55+00:00
dev 0 Reputation points
commented 2025-12-09T03:30:37.5266667+00:00
Danny Nguyen (WICLOUD CORPORATION) 5,445 Reputation points Microsoft External Staff Moderator
1 answer

How can I enable my software to trigger cloud filter placeholder retrieval?

I have a cloud filter provider which is running just fine, however I have noticed that if I programmatically traverse directories, the placeholders aren't fetched - it's only when doing it using explorer or command line. Is there something I can do to…

Windows development | Windows API - Win32
asked 2025-12-03T02:34:54.3666667+00:00
sysadmin 40 Reputation points
commented 2025-12-08T23:42:06.9333333+00:00
sysadmin 40 Reputation points
1 answer

[CFAPI] file handle from CfGetWin32HandleFromProtectedHandle cannot be used to read data.

Hi, I'm trying to implement a sync logic to upload local change to cloud. In this case I need to open local file for read, but it does not work as expected: Get a protected handle protected_handle from CfOpenFileWithOplock, works fine; Get a win32…

Windows development | Windows API - Win32
asked 2025-12-03T09:20:21.8733333+00:00
Aaron Liu 0 Reputation points
edited a comment 2025-12-08T10:18:50.1366667+00:00
Damien Pham (WICLOUD CORPORATION) 1,430 Reputation points Microsoft External Staff Moderator