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Magical Lasso tool in C#

Hetal Jariwala asked:

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Hey guys.
I have a picture box in my windows form.
Now i want if user click on a place on picture box the program automaticaally identifies the whole shape of it like round or ractangle and transparent rest of image i.e functionallity of magical lasso tool in Photoshop.
Any Suggestion of how to do this in c#
Tags: C#


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