[Gnuplot-bugs] problems calling gnuplot and running a file simultaneously

[vijay b. <vij...@gm...>]

i want to call gnuplot from a vc++ program and make it run a file .this file
(say output.txt) has the mulitplot option .i am at present using either the
"system" command or "RunSilent" command . in both cases gnuplot opens and
plots the graphs , but if i click the mouse once one of the plots disappear
. on the other hand if i just call gnuplot and then run this file , it works
perfectly .could some one help me ?

here is the file "output.txt":
cd 'c:/'
 set multiplot
set size 1,0.5
set origin 0.0,0.5
set title 'phase  plot'
set xlabel'Frequency'
set ylabel'phase'
set key below
plot  'data.dat' using 1:6t 'phase' with linespoints
 set origin 0.0,0.0
set title 'amplitude  plot'
set xlabel 'Frequency'
set ylabel 'amp'
set key below
plot 'data.dat' using 1:7t 'amp' with linespoints
unset multiplot

i use the command as :
system ("gnuplot output");
or
 RunSilent ("gnuplot output","");

ps: i use gnuplot-4.0.0 on windows xp