Sends an X ClientMessage event to all toplevel windows on the default
GdkScreen.
Toplevel windows are determined by checking for the WM_STATE property, as
described in the Inter-Client Communication Conventions Manual (ICCCM).
If no windows are found with the WM_STATE property set, the message is sent
to all children of the root window.
Sends an X ClientMessage event to all toplevel windows on the default GdkScreen. Toplevel windows are determined by checking for the WM_STATE property, as described in the Inter-Client Communication Conventions Manual (ICCCM). If no windows are found with the WM_STATE property set, the message is sent to all children of the root window.