[MSDN Library June 1998] WM_DDE_ACK (100%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Base Services > Interprocess Communication > Dynamic Data Exchange > Dynamic Data Exchange Reference > Dynamic Data Exchange Messages
[MSDN Library September 1992] WM_DDE_ACK (44.6335597057159%)
Product Documentation > Win32 SDK for Windows NT > Programmer's Reference: API (prelim. ) > API Function Reference > Messages
[MSDN Library September 1992] WM_DDE_ACK (34.9937965260546%)
Product Documentation > Windows 3.1 SDK > Programmer's Reference Volume 3: Messages, Structures, and Macros > Chapter 2 Messages > DM_GETDEFID