private void LoginBtn_Click(object sender, EventArgs e)
 {
     if (LoginDB.Login(UsernameTxt.Text, PasswordTxt.Text)) //logged in was returned true
     {
         this.Hide(); //hide login
         frmMain MainMenu = new frmMain(); //start new form
         MainMenu.ShowDialog();
         this.Close(); //when dialog returns control to login form, close imediatly
     }
     else
     {
         MessageBox.Show("Username or password were incorrect.");
         PasswordTxt.SelectAll();
         PasswordTxt.Focus();
     }
 }
        private void frmPackage_FormClosing(object sender, FormClosingEventArgs e)
        {
            frmMain main = new frmMain();

            main.DisplayPackages();
        }