XGrabButton has no effect on an active grab. A modifiers of AnyModifier is equivalent to issuing the ungrab request for all possible modifier com binations, including the combination of no modifiers. A button of AnyButton is equivalent to issuing the request for all possible buttons. XUngrabButton has no effect on an active grab. XUngrabButton can generate BadValue and BadWindow errors.
Some numeric value falls outside the range of values accepted by the request.
Unless a spe cific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. BadWindow A value for a Window argument does not name a defined Window.