SDK for MCE 2005 Released
The Media Center SDK is designed to help developers create applications and software components that take advantage of features provided by Windows XP Media Center Edition.
The Media Center SDK enables developers to:
Create Media Center hosted HTML applications.
Create Media Center hosted add-ins using managed code.
Direct Media Center to schedule the recording of TV programs from hosted HTML applications, add-ins, and external Windows applications.
Create device drivers and other software components that receive status information about the state of Media Center.
Create an input method editor (IME) module that adds a localized version of the on-screen keyboard, keypad, and input method editor to Media Center.
Microsoft Windows XP Media Center Edition 2005 Software Development Kit
Windows XP Media Center Edition on MSDN