I don't think the author intended it this way, but to answer your question of "So what if parts are copied from BOL"? Because...

1.  Plagerism is in pretty bad form.  Most learned readers would rather eat pond scum than read plagerized material.  By itself, copying material isn't plagerism... not giving very specific credit to the creators of the original infomation is.

2.  Because of the copy right Microsoft has on the info, the fact that the terms of use say "personal" and "non-commercial use" and may not be republished (in so many words), and the author got paid $50 for the web article which makes it both commercial and published, it's also against the federal copy right laws.

Some folks are worried about item 1 above... me too... I hate plagerism when it happens and represents one of the lowest forms of life there is.  Of more concern to me, though, is to warn my fellow authors that you can get the pant's sued off of you by Microsoft and other companies and, depending on the offense, may spend a little time in jail by doing this type of thing.  Ignorance is no excuse in the eyes of the courts.  Foreign nationals can also be expelled from the country within minutes of the conviction or jail time served.

Be careful what you copy, folks, even if you do give due credit...

Will Microsoft or other company come after you for this type of "minor" offense?  Dunno for sure but are you sure you want to test those waters?