private void btnLayer_Click(object sender, System.EventArgs e)
 {
     EEEP_LayerManaging lm = new EEEP_LayerManaging();
     lm.Show();
 }
 private void btnLayerManaging_Click(object sender, System.EventArgs e)
 {
     if(ewCheck.CheckOpenForm(ActiveForm, "EEEP_LayerManaging"))
     {
         EEEP_LayerManaging lm = new EEEP_LayerManaging();
         lm.MdiParent = ActiveForm;
         lm.Show();
     }
 }