File extension ctt information

The CTT file extension is associated with Microsoft Windows Live Messenger contacts file format. It is used to export and import a list of contacts from Windows Live Messenger. For these files to be opened properly, one will need to use Windows Live messenger, but the general content of the files using a text editor is what one will be able to view. Such a text editor like Notepad can view this file as it is an XML file. It is a propriety file that is used by Microsoft software.
File extension CTT stores a list of groups and contacts that are used by the MSN/Live Messenger instant messaging program. It is saved as a text file and is formatted in XML and can be exported from MSN Messenger and imported by another user. The contacts that are saved in this type of file can be imported into messenger by the link File->Import Contacts from a saved file. Being one of the largest networks, the Windows Live Messenger is aided by this file to put together contacts without using multiple accounts.