XClearArea can generate BadMatch, BadValue, and BadWindow errors. If the window has a defined back ground tile, the rectangle is tiled with a plane-mask of all ones and GXcopy function. If the window has back ground None, the contents of the window are not changed. XClearWindow can generate BadMatch and BadWindow errors. An InputOnly window is used as a Drawable.
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.