Hello all,
I need to ensure that the program I've created has only one running instance
on a given machine. This is the solution that I decided on (pattern found at
http://www.ai.uga.edu/~mc/SingleInstance.html):
[STAThread]
public static void Main()
{
bool ok;
Mutex m = new Mutex(true, "ProgID", out ok);
// make sure only one instance of program is running
if (! ok)
{
MessageBox.Show("Already running.", "Error!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
Application.Run(new MainForm());
GC.KeepAlive(m); // don't let the GC eat our mutex
}
** end
The problem is that this only prevents the process from running more than
once in a user session. The program runs on a server (it really should be a
Windows service, but can't be due to ridiculous requirements beyond my
control), so if it's running on the console session, someone is still able
to use terminal services, log in, and run another instance.
Therefore, I need some sort of "system global" mutex, or another mechanism
to achieve this.
What's the best way?
Thanks!
--
Neils Christoffersen
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