use Encode;
use Win32::GuiTest qw(FindWindowLike);

 open(MYFILE, '<:encoding(UTF-8)',"saml.txt") || die "cannot open: $!";
 open(OUTFILE,'>:encoding(UTF-8)',"out.txt") || die "cannot open: $!";
 $WindowTitle=<MYFILE>; #reading the chinese window title from input file
 chomp($WindowTitle);
 binmode(STDOUT, ":utf8");
 print "$WindowTitle\n"; #===> Here perl prints out some chinese text to the command console, but different from what is given in input file
 my @hwnd=Win32::GuiTest::FindWindowLike(undef,$WindowTitle);
 if($hwnd[0])
 {
	print "window found\n";
 }
 else
 {
	print "window not found\n";
 }
 
 print OUTFILE $WindowTitle; #==> Here perl prints out same chinese text as input to the outfile