private void btnOk_Click(object sender, System.EventArgs e) { this.Close(); this.Dispose(); if(rdoSearchBooks.Checked) { SearchBooks srch = new SearchBooks(); srch.ShowDialog(); } if(rdoReturn.Checked) { ReturnBook ret = new ReturnBook(); ret.ShowDialog(); } if(rdoAddBooks.Checked) { AddBooks add = new AddBooks(); add.ShowDialog(); } if(rdoCategory.Checked) { Category cat = new Category(); cat.ShowDialog(); } if(rdoChgPwd.Checked) { ChangePassword pwd = new ChangePassword(); pwd.ShowDialog(); } }