Sets the background of window. A background of NULL means that the window will inherit its background form its parent window. The windowing system will normally fill a window with its background when the window is obscured then exposed.
a pattern to use, or NULL. [allow-none]
See Implementation
Sets the background of window. A background of NULL means that the window will inherit its background form its parent window. The windowing system will normally fill a window with its background when the window is obscured then exposed.