[MSDN Library April 2000] WM_USER (100%)

MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows User Interface > Windowing > Messages and Message Queues > Messages and Message Queues Reference > Messages and Message Queues Messages

[MSDN Library September 1992] WM_USER (42.5932511458827%)

Product Documentation > Win32 SDK for Windows NT > Programmer's Reference: API (prelim. ) > API Function Reference > Messages

[MSDN Library September 1992] WM_USER (40.0499537999538%)

Product Documentation > Windows 3.1 SDK > Programmer's Reference Volume 3: Messages, Structures, and Macros > Chapter 2 Messages > DM_GETDEFID

[MSDN Library April 2000] WM_USER (39.6646646646647%)

MSDN Library - April 2000 > Windows CE Documentation > Application Development > API Reference > User Interface > Messages