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How to recognise a word on screen?

I want to recognise word on screen, then I can translate it.
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wangtu
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wangtu
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alexoCommented:
Are you trying to accomplish something like Babylon does?  In the general case, it is very difficult.  The only thing you can lift from the screen is a bitmap.  You have to use a character recognition engine to interpret it.  However, if you limit yourself to edit controls, you can use the EM_CHARFROMPOS message.
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wangtuAuthor Commented:
not only Edit control,  also in menu ,statusbar, etc
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alexoCommented:
Then you have to use an OCR engine (and those are a hell to write).
Windows just doesn't have the functionality.
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