private void GetActiveWindow()
 {
  try
  {

   const int nChars = 256;
   int handle = 0;
   StringBuilder Buff = new StringBuilder(nChars);

   handle = GetForegroundWindow();

   if ( GetWindowText(handle, Buff, nChars) > 0 )
   {
    textBox1.Text = Buff.ToString();
   }

   comboBox1.Visible = false;
   button1_Click(null,null);
  }
  catch(Exception wentWrong)
  {
//    MessageBox.Show(this,wentWrong.Message);
  }

 }