private void menuItem20_Click(object sender, System.EventArgs e)
		{
			 //Display frmAbout as a modal dialog 
			Form DialogBox = new DialogBox();
			DialogBox.ShowDialog();

			if (DialogBox.DialogResult == DialogResult.OK)
			{
				MessageBox.Show("The OK button on the form was clicked.");
				DialogBox.Dispose();
			}
			else
			{
				MessageBox.Show("The Cancel button on the form was clicked.");
				DialogBox.Dispose();
			}
		}

           dataView1.RowFilter = "Объявление = dialogBox.Param";

           dataView1.RowFilter = "Объявление = '*Куплю*'";