for richer call control features (Call Transfer, Call Hold, Call Diversion, Call Park and Pickup). Windows Messenger and RTC (Real-Time Communication) Client API to provide IM, presence, AV communications, whiteboarding, application sharing, Acoustic Echo Cancellation, media encryption, PC to phone and phone to PC services to applications. For computers in a workgroup, the Windows Time Service in Windows XP supports a new Internet Time feature (NTP client), which updates the clock on the user's computer by synchronizing with an NTP time server on the Internet. This feature is useful for computers whose real-time clock does not maintain the correct time. Microsoft Message Queuing 3.0 supports: Internet Messaging (referencing queues via HTTP, SOAP-formatted messages, MSMQ support for Internet Information Services), queue aliases, multicasting of messages, and additional support for programmatic maintenance and administration of queues and MSMQ itself. MSMQ 3 clients directly communicate with Active Directory using LDAP. Other features Internet Information Services 5.1 COM+ 1.5 Speech Application Programming Interface 5.1 SAPI 5 support in Microsoft Narrator Paint is based on GDI+ and therefore, images can be natively saved as JPEG, GIF, TIFF and PNG without requiring additional graphics filters (in addition to BMP). However, alpha channel transparency is still not supported because the GDI+ version of Paint can only handle up to 24-bit depth images. Support for acquiring images from a scanner or a digital camera was also added to Paint. WordPad has full Unicode support in Windows XP, enabling WordPad to support multiple languages. Windows XP SP1 ships with the RichEdit 4.1 control. General improvements to international support such as more locales, languages and scripts in Uniscribe, expanded MUI support, improved IMEs and National Language Support Regional and Language Options group East Asian languages, and complex script & left-to-right languages together, installable by checking a single check-box option. There is font fallback support for East Asian languages. Windows XP introduces a new "Location" variable which can be set by the user and queried using the GetGeoInfo API to provide location specific services Full Unicode support in the RichEdit control shipped in Windows XP and used by WordPad. Support for tablet and pen-sensitive screens, portrait-oriented screens in Windows XP Tablet PC Edition. It also includes speech recognition to control the operating system and for text dictation in applications using the RichEdit control or the Text Services Framework, handwriting recognition and digital ink support accessible through the Tablet PC Input Panel