If the window has a defined background tile, the rectangle is tiled with a plane-mask of all ones and GXcopy function. If the window has background None , the contents of the window are not changed. If you specify a window whose class is InputOnly , a BadMatch error results. 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 specific 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.