breaking out of script

[Daniel J S. <dan...@ie...>]

I've spruced up the Tcl/Tk demo a bit.  A list box selects the demo to 
run.  There is the "Next" button that Donald included.  I want to 
include a "Stop" button for breaking out of the demo.  In other words, I 
want the "Stop" button to behave as a cntrl-C to gnuplot.  Any idea of 
how to do that from a non-command-line environment?  I'm guessing that 
may be system dependent.  Is there an escape character I can send to 
gnuplot when in pause mode that will stop it executing any script files? 
 I've tried sending ESC (0x1b) or CAN (0x18), but I think gnuplot would 
have to be programmed to break upon seeing those characters.  Worth 
patching somehow?

Dan