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Fast pixel plotting in Vb

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Hi guys I am making a image scanner for a Robotical Vision Project, to preview the results i use the Api setpixel function but this is really very very slow(up to two seconds for a 640x480 image). How can i do fast pixel plotting in vb ( i know c++ but i am using the Visual Basic for to make fast a preview of the whole project).

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use safearrays- http://www.dacademy.8m.com/cgi-bin/framed/2301/gp/3d/

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