Hi,
I want my program to justify if itself are running. If another same program is running, it will exit. The program will run on both win32 and linux, so i do not want use the linux 'ps' command and the module that list win32 processes. Is there a universal method both on win32 and linux? I know Java have a method like below:

public static void Main(string[] args) {

  System.Threading.Mutex mutex = newSystem.Threading.Mutex

(false,"ThisShouldOnlyRunOnce");

  bool Running= !mutex.WaitOne(0,false);
  if(!Running)
    Application.Run(newFormMain());
  else
    MessageBox.Show("It is started!");
}
[download]

Do perl have similar method?
Thanks!

2006-01-01 Retitled by planetscape, as per Monastery guidelines
Original title: 'How to justify the program itself are running?'