所使用的Windows Live Messenger的軟件文件,由微軟開發的IM(即時通訊)的應用程序,附加的.ctt擴展。這些CTT文件通常被歸類為數據文件,因為存儲在這些CTT文件用於存儲和顯示由用戶輸入到他們的聯繫人列表中該IM軟件的詳情的Windows Live Messenger的應用程序引用數據。這些CTT文件的內容進行編碼以純文本格式,並且還執行與基於XML的規範,用於存儲數據。 Mac用戶可以安裝開發用於Mac環境中實現支持功能集成到他們的系統,這些CTT文件微軟公司的MSN軟件。在MSN Messenger的IM工具也使用這些CTT文件,並可以通過微軟Windows用戶安裝。基本的文本編輯應用程序也可以用來打開和查看存儲在貼有文件的內容.ctt擴展。這些IM應用程序提供直觀的特點在它的GUI(圖形用戶界面),使用戶不需要在這些CTT文件中手動輸入數據。
Windows Live Messenger is an Instant Messaging (IM) application developed by Microsoft. It is an easy and a quick way to communicate with other people and it is simple to use. It is useful for keeping in touch with family and friends. In MSN Messenger, you can add static smileys, give yourself a nickname, change the color scheme of your messenger box, add or change your display picture, send pictures to your contacts, send and receive animated smileys, etc. It supports operating systems like Windows Mobile, Windows Phone, Windows CE, Xbox 360, Blackberry OS iOS, Java ME, S60 on Symbian OS 9.x, Windows XP up to wave 3, Windows Vista, Windows 7 and Zune HD.
Windows Contacts is a contact manager which is packed in Windows Vista and Windows 7, which replaced and retained most of the functionality of Windows Address Book, with an integration of Windows Mail. Windows Contacts uses a new XML-based schema format where each contact appears as an individual contact file, and can saved custom information including pictures. The file in a .wab format and the open standards, *.vcf (vCard) and *.csv (CSV) are also supported. Some uses of Windows Contacts are: a) it is implemented as a special folder in Windows Vista and Windows 7, b) it can import vCard, CSV, WAB and LDIF formats, c) it can export in vCard 2.1 and CSV formats, d) it can print contacts in Memo, Business Card, and Phone List formats, e) individual contacts can be quickly accessed from the Start menu search text box, f) Windows Live People, the contact manager for Windows Live Messenger and Windows Live Mail can saved its information in the Windows Contacts folder if the option to encrypt it is unchecked in Windows Live Messenger. At any time contacts in Messenger are updated, they'll be updated in Windows Contacts as well, and g) it exposes APIs for making new contacts, reading and writing in an existing contact, adding a "Label" in the form of a URI to a "Property" or a "Property" to a "Contact", API for matching devices with Windows Contacts.