FlyoutTheme
Accent = 4
The flyouts theme will match the host window's accent color.
Adapt = 0
Adapts the Flyout's theme to the theme of its host window.
Dark = 2
The dark theme. This is the default theme.
Inverse = 1
Adapts the Flyout's theme to the theme of its host window, but inverted.
This theme can only be applied if the host window's theme abides the "Dark" and "Light" affix convention.
(see GetInverseAppTheme for more infos.
Light = 3