SetControlText

delegate void SetTextCallback(Control ctrl, string value);
void SetControlText(Control ctrl, string value)
        {
            // InvokeRequired required compares the thread ID of the
            // calling thread to the thread ID of the creating thread.
            // If these threads are different, it returns true.
            if (ctrl.InvokeRequired)
            {
                SetTextCallback d = new SetTextCallback(SetControlText);
                this.Invoke(d, new object[] { ctrl, value });
                //d.Invoke(lbl, txt);
                //this.Invoke(d, new object[] { text });
            }
            else
            {
                ctrl.Text = value;
            }
        }