Thunk
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A thunk is a computer programming technique where a piece of code is executed to provide an address. The most common usage is in the Win16 / Win32 API, where thunking is used to convert a 16 bit address into a 32 bit equivalent or vice versa. The ubiquitous early example was "wsock32.dll", a thunking layer added to allow Win32 Internet applications to use the Win16 "winsock.dll" Sockets library originally written for Windows 3.1.1
Earlier implementations of thunking include early Algol 60 implementations.
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