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many usb camera has a button, when push it, some program can do something, i use the Twain class can show the image window, but i want to know when push the button, don’t want to show the window, how can i do, thank you.
i have know the program like :http://www.codeproject.com/info/search.asp?cats=2&cats=6&searchkw=TWAIN&Submit1=Search&author=&sd=15+Nov+1999&ed=7+Jan+2007
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