I need to retrieve the handle of a window selected by the user and then retrieve its handle. This window must be one of those shown when ALT+TAB is pressed. I tried enumerating the windows using En...

I want to get a build version on Windows 10 using WINAPI. Current Window Version: 10.0.19042.685 I tried to get it using WMI queries. select Version, BuildNumber from Win32_OperatingSystem. -> V...

I would like to present meaningful error messages when my program encounters Win32 errors. I call GetLastError, and then FormatMessage. But some of the error messages contain placeholders. For inst...

On Windows, you can call SetProcessAffinityMask for a process and SetThreadAffinityMask for a thread. However, Windows only appears to expose GetProcessAffinityMask and not a similar API for indivi...

I'm using C and sometimes I have to handle paths like C:\Whatever C:\Whatever\ C:\Whatever\Somefile Is there a way to check if a given path is a directory or a given path is a file?

I have a shared network folder \\some.domain.net\Shared that contains multiple shared subfolders with different permissions for different users. I wish to open connections to multiple subfolders fr...

What is the simplest way to wait for more objects than MAXIMUM_WAIT_OBJECTS? MSDN lists this: Create a thread to wait on MAXIMUM_WAIT_OBJECTS handles, then wait on that thread plus the other han...

I am trying to get another process' command-line parameters (on WinXP 32bit). I do the following: hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ | PROCESS_TERMINATE, FALSE, Proc...

For the sake of description, I provide a minimal reproduction of the following code: #include <bits/stdc++.h> #include <iostream> #include <regex> #include <string> #include...

I'm a beginner and I'm trying to build an open source project for the first time in Windows, but I keep running into file not found errors when building. What I've found so far is that a header fil...

I've successfully registered an audio codec (x64,x86) for Media Foundation and third-party apps to use. MF can load an MP4 which contains audio compressed with it. However, the default Windows 11 M...

As described in this question I'm trying to create a custom audio codec and save it with the Sink Writer in a MP4 file. I succeeded with the aid of setting MF_MT_MPEG4_SAMPLE_DESCRIPTION, following...

I'm trying to encode audio to an MP4 file with a custom compression codec and my IMFTransform works correctly until SinkWriter's Finalize: 0xc00d4a45 : Sink could not create valid output file becau...

There are many questions on this site regarding Unicode and wchar_t. I guess I have grasped the concept, but then found something that proves most (if not all) answers wrong if it is true. On this ...

Thanks to a very old post available here https://web.archive.org/web/20140217003950/http://forum.sysinternals.com/topic16893_post83634.html I came across a function that will call WinVerifyTrust on...

In my MSI installer custom-action handler (done with C++) I cannot obtain the SE_DEBUG_NAME privilege to be able to open and terminate a process, thus I have to resort to doing it with the taskkill...

Now that Microsoft have reinstated OneDrive in the file system in Windows 10 (and assuming they don't drop it again in 6 months time), I'm looking for how to determine the sync status of an arbitra...

I'd like to change the presence state in an App automatically to DND when Focus Assist is turned on. So two questions basically: Is it possible to check Focus Assist state through e.g. Windows 10 ...

I want to create a simple tooltip that will pop when user hovers over a button. To do that I have studied this example from MSDN. Everything works fine when I first time hover over the button, b...

How can I get the size of the display in centimeters or inches? This code does not always works correctly: HDC hdc = CreateDC(_T("DISPLAY"),dd.DeviceName,NULL,NULL); int width = GetDeviceCaps(hdc...

I've registered a window with RegisterDeviceNotification and can successfully recieve DEV_BROADCAST_DEVICEINTERFACE messages. However, the dbcc_name field in the returned struct is always empty. Th...

I have a cmd script that will execute a set of patches, and it's designed to abort if a reboot is required to avoid patching issues. I'd also like to extend the script to abort if a reboot is sched...

I want the worker threads to send a user-defined message to the UI thread message queue, but I am not sure if I should use WM_USER or WM_APP. The documentation for WM_APP says: WM_APP through 0x...

A customer is using our dll which is creating a child process which uses an open source library, which ultimately fails because of a call to LoadLibraryExW(), the last error returned is ERROR_MOD_N...

I want to extract a path from the following registry key: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\OpenSavePidlMRU I didn't find any documentation, but it seems...