Abstract: Capturing word from screen refers to that the software can recognize the characters at the position pointed by mouse along with its movements. The aim of this study is to assist in browsing online and online reading of articles in foreign language. After introducing the principles for capturing word from screen under Windows 2000/XP context, this study proposes a method which obtains the character string at the mouse position in terms of code interception, mouse HOOK and screen refresh and more, then gives the implementation on Delphi. The application demonstrates that this method possesses the favorable commonality and flexibility. In the end, it makes analysis on the limitations of this method under some particular situations.