My program changed its behavior after updating Visual Studio to the latest version (2026). Simplifying it, I got the following minimal example, which contains a ternary operator with a throw in ...

I am encountering suspicious behavior with std::atomic_ref::is_lock_free() in Microsoft Visual Studio's C++ compiler (MSVC version 14.38.33130). The method returns true for a very large structure (...

I wrote two versions of a little program in C++ with MSVC on Windows 11: First one: #include <iostream> #include <Windows.h> int main() { SetConsoleOutputCP(CP_UTF8); std::cout &...

Here's the code: struct S{}; int main() { S::S{}; return 0; } When using GCC and Clang, it will fail with a clear error output: qualified reference to 'S' is a constructor name rather than a ...

In the question Why does Microsoft's implementation of std::string require 40 bytes on the stack? the observation is made, that a std::string requires 8 additional bytes in Debug mode. After ...

In a modeless dialog box in MFC, I want to create an edit box control, derived from CEdit, that will allow me to intercept keystrokes (in particular the CR) and process it differently from the default ...

I'm trying to subclass an edit box in a dialog in VS C++ 2022. I want to intercept any key presses in a particular edit box to do further processing. Here's my code. The 4th line confuses me because I ...

Consider the following snippet: int main() { struct Local { virtual void foo() = 0; }; void (Local::* ptr)() = &Local::foo; } When compiling with C++20, GCC 13.3.0 and Clang 18.1.3 ...

When I perform integer division by zero on Windows 11 on Arm64, it raises a SEH exception. That is rather surprising, considering Arm by default does not trap zero division. My question is: does the ...

I'm trying to register a Thread-Local Storage (TLS) callback in a Windows application without using the C runtime (CRT). Compiler: MSVC 14.44.35207 (Visual Studio 2022) Target: x64 OS: Windows 11 I ...

I am trying to call idiv r/m8 using MSVC2022's current Microsoft Visual C++ Compiler 17.4.33403.182 and C++. Using the most straightforward approach: struct cdiv_t { // char std::int8_t quot; ...

Using CMAKE_BUILD_TYPE="Debug" my MSVC 2022 [17.4.33403.182] produced one idiv call for the quotient and an identical idiv call for the remainder. The code was simply [see here for the ...

I'm programming a MFC application that should be internationalized. Currently I'm providing separate language DLLs per architecture (ARM64, x86, x64), but I'm unsure whether this is really necessary. ...

I'm programming a MFC application that should be internationalized. Currently I'm providing separate language DLLs per architecture (ARM64, x86, x64), but recently I came accross ::LoadLibraryEx(...

I'm having an issue with WinAPI Edit controls in a child window - they don't respond to mouse clicks, but work fine when placed in the main window. Other controls like buttons work normally in both ...