Gets the pattern used to clear the background on window. If window does not have its own background and reuses the parent's, NULL is returned and you'll have to query it yourself. Since 2.22
The pattern to use for the background or NULL to use the parent's background. [transfer none]
See Implementation
Gets the pattern used to clear the background on window. If window does not have its own background and reuses the parent's, NULL is returned and you'll have to query it yourself. Since 2.22