Windows Build Number

Win32NT 10.0.26100.0 Microsoft Windows NT 10.0.26100.0

Processor Architecture

AMD64

Memory

64GB

Storage Type, free / capacity

1TB

Relevant apps installed

None, just Windows

Traces collected via Feedback Hub

None

Isssue description

memory leak in PostMessage from user32.dll

Steps to reproduce

Everytime I use PostMessage in a new thread it leaks 8 bytes with a 32bits application and16 bytes with a 64bits application. This should not be the case.

Build and run the application from https://github.com/ArnaudVERSINI/user32_memory_leak/ using cargo run --release and wait, memory will increase.

Expected Behavior

No memory leaks like on Windows 10

Actual Behavior

Memory leaks only on Windows 11