Specifies the widget to register the drawable for.
associates the specified drawable with the specified widget so that
future calls to
with the drawable will return the widget. The default event dispatcher
will dispatch future core events that arrive with the drawable to the
widget as though the event contained the widget's window, but the event
itself will not be changed in any way when being passed to even handler
or action procedures.
If the drawable is already registered with another widget, or if the
drawable is the window of a widget in the client's widget tree, the
results of calling
removes an association created with
If the drawable is the window of a widget in the client's widget tree
the results of calling
X Toolkit Intrinsics - C Language Interface Xlib - C Language X Interface