I learned how to copy text from a MessageBox about five years ago from one of my co-workers. For those of you who haven’t learned this trick yet; here it is.
Let assume that we have a Message Box like one on the right. To copy the message all you need to do is to press Ctrl-C when the Message Box has focus.
Next open your favorite text editor like Notepad and paste it there by pressing Ctrl-V. You’ll see text similar if not identical to this one:
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Caption
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Some Message!!!
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OK
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How cool is that.