void asyncConnectHandler(IAsyncResult ar)
{
if (InvokeRequired)
{
BeginInvoke(new AsyncCallback(asyncConnectHandler), new object[] { ar });
return;
}
PLC p = (PLC)ar.AsyncState;
try
{
p.EndConnect(ar);
connectStatusL.Text = "Connected asynchronously!";
}
catch (InvalidCredentialException exc)
{
connectStatusL.Text = "Invalid password";
}
catch (Exception exc)
{
connectStatusL.Text = "Error: " + exc.Message;
}
}