"c:\program files\microsoft office\office11\winword.exe" "c:\perl\test.doc" /q /n /mFilePrintDefault /mFileExit

Without seeing your code and a better description of what happens, this is the best I can do.

Thanks!!;
below is my snippet:

my $dir;
opendir ($dir, ".") or die "error!\n";

for my $file_name (readdir $dir) {
    next if $file_name =~ m/^\./;
    system("c:\\program\ files\\microsoft\ office\\office10\\winword.e
+xe", "$file_name", "/q", "/n", "/mFilePrintDefault", "/mFileExit");
    sleep 10;
}
[download]

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I am trying to improve my English skills, if you see a mistake please feel free to reply or /msg me a correction

Not sure if that was a typo, but you have some back-slashes missing from your system call, should be:

system("c:\\program\\files\\microsoft\\office\\office10\\winword.exe",
+ "$file_name", "/q", "/n", "/mFilePrintDefault", "/mFileExit");
[download]

One option to stop the windows showing is to run the program with the C API CreateProcess and set the SW_HIDE attribute to the main Window, unfortunately it looks like Win32::Process does not support that.:(

You could adapt it to loop over a list of files.

Otherwise, I would suggest you only feed Word one file at a time. Yes this will mean that you have to wait until each file has been send to the printer and yes this means that you have to re-start Word time-and-time-again (which is inefficient and slow).