Gets the list of children of window known to GDK.
This function only returns children created via GDK,
so for example it's useless when used with the root window;
it only returns windows an application created itself.
The returned list must be freed, but the elements in the
list need not be.
Gets the list of children of window known to GDK. This function only returns children created via GDK, so for example it's useless when used with the root window; it only returns windows an application created itself. The returned list must be freed, but the elements in the list need not be.