[MSDN Library June 1998] WM_DDE_ACK (34.9937965260546%)
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 April 2000] WM_DDE_ACK (34.9937965260546%)
MSDN Library - April 2000 > Platform SDK > Base Services > Interprocess Communications > Dynamic Data Exchange > Dynamic Data Exchange Reference > Dynamic Data Exchange Messages