private void button2_Click(object sender, EventArgs e)
        {
            // retrieve Notepad main window handle
            IntPtr hWnd = FindWindow("TFconsVis", "Consultar Visitas...X");
//            IntPtr hWnd = FindWindow("TForm1", "Form1555...");
            if (!hWnd.Equals(IntPtr.Zero))
            {
                // SW_SHOWMAXIMIZED to maximize the window
                // SW_SHOWMINIMIZED to minimize the window
                // SW_SHOWNORMAL to make the window be normal size
                ShowWindow(hWnd, SW_RESTORE);
                SetForegroundWindow(hWnd);
                //SendKeys.SendWait("{ENTER}");
                SendKeys.SendWait("{F10}");
            }
        }