| tclServiceMode {tcltk} | R Documentation | 
This function controls or reports on the Tcl service mode, i.e. whether Tcl will respond to events.
tclServiceMode(on = NULL)
on | 
(logical) Whether event servicing is turned on. | 
If called with on == NULL (the default), no change is made.
The value of the Tcl service mode before the call.
## Not run: 
    
    oldmode <- tclServiceMode(FALSE)
    # Do some work to create a nice picture.  Nothing will be displayed until...
    tclServiceMode(oldmode)
## End(Not run)