C#

YourForm yf = new YourForm();
yf.Show();

yf = new YourForm();
yf.FormClosing += new EventHandler(YourFormClosing);
yf.Show();

private void YourFormClosing(object sender, EventArgs e)
   {
   yf = null;
   }

if (yf != null)
   {
   yf.Close();
   }

Jacob Dixon wrote:

You might be wondering why I call abort. This is because I really couldn't think of a better way to abort the current operation if the user clicks another computer. Having it wait until its done before letting the user choose another computer really isn't an option (because WMI can take a while sometimes).

Jacob Dixon wrote:

My problem is if you close the form while these threads are running. Right now I forgot to include anything for it and it causes teh app to crash.

Jacob Dixon wrote:

What is the "best practice" for handling something like this?

ManagementObjectSearcher query = new ManagementObjectSearcher(managementScope, new ObjectQuery(szSelectStatement));
ManagementOperationObserver observer = new ManagementOperationObserver();
observer.CompletedEventHandler += /*someHandler...*/;
ManagementObjectCollection queryCollection = query.Get(observer);

public void ThreadFunc(object obj)
{
   try
   {
       DoSomeOperation();
   }
   catch(ThreadAbortException ex)
   {
       // gets called if you abort your
       // thread and after finally
       DoAbortCleanupStuff();
   }
   finally
   {
       // general cleanup stuff
   }
}