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[froza]

The subject might not be easy to understand, but let's take an example, you're application have 2 forms, and you wanted both the forms to stick together at anywhere, anytime, so one of the form must be a reference point to the other form.
I wanted the 2nd form to be on the top left of the 1st form(reference point), so to calculate the location for the 2nd form will be like the following formula :

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Form1.Location.X - Form1.size.width, Form1.Location.Y - Form1.size.height

In order to calculate other locations, here's the explanation to the formula :
Form1.Location.X - Form1.size.width = Left
Form1.Location.X + Form1.size.width = Right
Form1.Location.Y + Form1.size.height = Bottom
Form1.Location.Y - Form1.size.height = Top
Here, I've pre-calculated some of the basic locations :
bottom left :

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Form1.Location.X - Form1.size.width, Form1.Location.Y + Form1.size.height

bottom right :

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Form1.Location.X + Form1.size.width, Form1.Location.Y + Form1.size.height

top left :

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Form1.Location.X - Form1.size.width, Form1.Location.Y - Form1.size.height

top right :

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Form1.Location.X + Form1.size.width, Form1.Location.Y - Form1.size.height

[MrAksel]

Very nice tutorial, this is a cool thing to have in every program! Great work and welcome to the site!