Winforms form border styles FixedSingle and FixedDialog?

Question

What's the difference between the Winforms form border styles FixedSingle and FixedDialog?

Despite the MSDN docs, there is no difference in the appearance of either border style on Windows 7:

Answer 1

From MSDN:

FixedDialog: A thick, fixed dialog-style border.

FixedSingle: A fixed, single-line border.

Also, while the date shows it might be out-dated, here is another possible description of the differences:

Fixed Dialog: Used for dialog boxes. Not resizable. Can include control-menu box, title bar, Maximize and Minimize buttons on the title bar. Creates a recessed border relative to the body of the form.

Fixed Single: Not resizable. Can include control-menu box, title bar, Maximize button, and Minimize button. Resizable only using Maximize and Minimize buttons. Creates a single line border.

Emphasis mine.