private void picBox_ppt_Click(object sender, EventArgs e)
 {
     if (checkBoxAskMe.Checked == true)
     {
         if (copy == "1")
         {
             if (ppt == null)
             {
                 ppt = new uploadPPT("");
                 //f2.MdiParent = this;
                 ppt.FormClosed += new FormClosedEventHandler(ppt_FormClosed);
                 ppt.ShowDialog();
             }
             else
             {
                 ppt.Activate();
             }
         }
         else
         {
             MessageBox.Show("You are not using full version of PIA Utility App", "PIA Utility Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
         }
     }
     else
     {
         MessageBox.Show("Please Connect Pendrive with Utility app first", "PIA Utility Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
 }
 void ppt_FormClosed(object sender, FormClosedEventArgs e)
 {
     ppt = null;
     //throw new NotImplementedException();
 }