Make a form’s background transparent

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You can set the BackColor of your form to an uncommon color (say Color.Magenta) then set the form’s TransparencyKey property to the same color. Then, set the FormBorderStyle to None.

Of course, that’s just the quick and easy solution. The edges of controls are ugly, you have to keep changing the background color of new controls you add (if they’re Buttons or something like that) and a whole host of other problems.

It really depends what you want to achieve. What is it? If you want to make a widget sort of thing, there are much better ways. If you need rounded corners or a custom background, there are much better ways. So please provide some more information if TransparencyKey isn’t quite what you had in mind.

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