Set X property name on window win to value. win is the window to set the X property on, an X window id, or 'root-window. name and type are strings or X/11 atoms (longs). type defaults to "STRING". format may be one of the integers 8, 16, and 32, defining the element size of the value. It is 8 by default. If format is 8, value may be a string or a list of null-terminated strings. Otherwise it will be a vector of format-bit integers. action may be one of the symbols 'replace, 'prepend, or 'append signifying how the new value should be merged (if at all) with the existing value.