Hello All. I was trying to find out how Winamp changes the MSN Messenger music song message. It sends WM_COPYDATA messages to a hidden MSN window with classname "MsnMsgrUIManager". The data pointed by LPARAM is a COPYDATASTRUCT with the number 0x547 in the dwData field. This is a number MSN uses to identify personal message changes. The string pointed by the lpData field is a unicode string with the following format: "Winamp \ 0Music\ 01\ 0{0}\ 0Text_here\ 0\ 0\ 0\ 0\ 0" (no spaces betwe