多重觸控是近年來新發展起來的輸入裝置，在2006-2008年間，各種多重觸控的技術頻繁的被提出，也有一些產品出現在市面上。不過大部分的產品提供的多是一套函式庫，讓想應用這產品的開發人員自行使用，這使得開發人員必須想辦法讓應用程式支援裝置函式庫，這些修改應用程式的工作是耗時且沒有意義的，希望能有一個解決方案解決此問題。
本論文提出一個方法，透過視窗系統支援來解決這個問題，使得應用程式不用被修改就可以擁有多重觸控支援。多重觸控裝置上的多個點將被對應到多個游標上，每個游標都有自己獨立的訊息通道，都可以送訊息給應用程式。我們選擇DirectFB作為視窗系統，用GTK+作為圖形介面，用Wii Remote作為多重觸控輸入裝置。在DirectFB上發展一個新的視窗管理模組來實現多個獨立游標。我們將著重於對舊的應用程式支援，而不是發展新的訊息機制讓應用程式能支援多重觸控。並提出一些策略來更新畫面，設定一些參數來評估效能。

Multi-touch devices are new input devices grown up in recent years. In 2006-2008, many solutions were proposed to achieve multi-touch. Some manufacturers produce various multi-touch devices, but most of them provide only libraries for developers to use. It means that developers had to rewrite all applications to fit to those libraries. Those reworking for applications are time-consuming and meaningless. It might be good if there exists a solution to prevent reworking.
This thesis proposes a way to solve this problem at windowing system level so that applications won't be changed. Multiple points on device are mapped to multiple cursors, each cursor has ability to send events to application independently. We select DirectFB as windowing system, GTK+ as graphical user interfaces toolkit, and Wii Remote as multi-touch input device. We develop a new window manager for DirectFB to support multiple cursors. We focus on supporting legacy applications, without creating new event to support multi-touch. We also propose several strategies on updating screen, and set several parameters to evaluate performance.

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