Nudging
Encyclopedia
Nudge, also known as buzz, is a feature of instant messaging
Instant messaging
Instant Messaging is a form of real-time direct text-based chatting communication in push mode between two or more people using personal computers or other devices, along with shared clients. The user's text is conveyed over a network, such as the Internet...

 software used to get the attention of another user, for example, by shaking the conversation window or playing a sound. The feature was first introduced in MSN Messenger 7.0, in 2005.

XMPP extension protocol XEP-0224 calls this feature Attention.

MSN Messenger and Windows Live Messenger

It is possible to change memory values of Windows Live Messenger to allow nudges to be sent unlimited with no time delay. This can be done manually with a memory editor such as Cheat Engine
Cheat Engine
Cheat Engine, commonly abbreviated as CE, is an open source memory scanner/hex editor/debugger created by Eric Heijnen for the Windows operating system. Cheat Engine is mostly used for cheating in computer games, and is sometimes modified and recompiled to evade detection. This program resembles ,...

 or with patching programs. Virtually all instant messaging programs that support the MSN protocol
.NET Messenger Service
The .NET Messenger Service is an instant messaging and presence system developed by Microsoft in 1999 for use with its MSN Messenger software and used today by its current instant messaging clients, Windows Live Messenger and Microsoft Messenger for Mac...

 (such as aMSN
AMSN
aMSN is a free Windows Live Messenger clone. aMSN attempts to emulate the look and feel of Windows Live Messenger, and supports many of its features...

 and Pidgin
Pidgin
A pidgin , or pidgin language, is a simplified language that develops as a means of communication between two or more groups that do not have a language in common. It is most commonly employed in situations such as trade, or where both groups speak languages different from the language of the...

) allow this to be done without any extra hacks.
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