User32.dll Documentation Jun 2026

But for many user32.dll functions, GetLastError is . This is documented poorly. For example:

| Function | Introduced | Notes | |----------|-------------|-------| | SetWindowLong | Windows 95 / NT 4.0 | Limited to 32-bit offsets | | SetWindowLongPtr | Windows XP (64-bit) | Required for 64-bit compatibility | | GetDpiForWindow | Windows 10 (1607) | Modern DPI awareness | | RegisterPointerInputTarget | Windows 8 | Touch input | user32.dll documentation

: A community-driven resource specifically for C# and .NET developers needing the exact DllImport signatures to call user32.dll functions. Common Functions & Features But for many user32

. It enables applications to implement a graphical user interface (GUI) that integrates seamlessly with the Windows environment Stack Overflow Core Functionality Common Functions & Features

The heart of Windows programming is the message loop. emphasizes this concept heavily.