Text Services Framework

Text Services Framework
Developer(s)Microsoft
Operating systemMicrosoft Windows
PlatformIA-32, x86-64, Itanium, ARM64
PredecessorInput Method Manager (IMM32)
TypeSoftware framework
Websitedocs.microsoft.com/en-us/windows/win32/tsf/text-services-framework

The Text Services Framework (TSF) is a COM framework and API in Windows XP and later Windows operating systems that supports advanced text input and text processing. The Language Bar is the core user interface for Text Services Framework.