private void ColumnToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ColumnNamesForm l_ColumnNamesForm = new ColumnNamesForm(this);

            DataTable l_DataTable = this.dataGridView.DataSource as DataTable;

            for (int iIndex = 0; iIndex < l_DataTable.Columns.Count - 1; iIndex++)
            {
                l_ColumnNamesForm.listBox.Items.Add(this.dataGridView.Columns[iIndex + 1].HeaderText);
            }

            l_ColumnNamesForm.ShowDialog(this);
        }
        private void ColumnToolStripMenuItem_Click( object sender, EventArgs e )
        {
            ColumnNamesForm l_ColumnNamesForm = new ColumnNamesForm(this);

            DataTable l_DataTable = this.dataGridView.DataSource as DataTable;
            for ( int iIndex = 0; iIndex < l_DataTable.Columns.Count - 1; iIndex++ )
                l_ColumnNamesForm.listBox.Items.Add( this.dataGridView.Columns[iIndex + 1].HeaderText );

            l_ColumnNamesForm.ShowDialog( this );
        }