This function modifies or removes an arbitrary X11 window property of type UTF8_STRING. If the given @window is not a toplevel window, it is ignored.
Property name, will be interned as an X atom
Property value, or %NULL to delete
3.4
See Implementation
This function modifies or removes an arbitrary X11 window property of type UTF8_STRING. If the given @window is not a toplevel window, it is ignored.