C# transparent border for borderless form

Question

I\'m creating a borderless form and I want to add a custom border to it. When I add the background for the form however, it doesn\'t show well, and it is not transparent. <

Answer 1

Okay so I cheated a bit but what I did was simply overriding the CreateParams to draw dropshadow even though it's a borderless window. It does exactly what I wanted so I went with it.
Thanks for all the help!