private string SaveWorkbook()
{
string filename = Utilities.GetTemporaryFileWithExtension("wwb");
Workbook workbook = new Workbook();
workbook.Open(filename);
foreach (ListViewItem lvi in listViewFiles.Items)
{
WorkbookItem wbi = lvi.Tag as WorkbookItem;
workbook.AddWorkbookItem(wbi);
}
workbook.Save();
return filename;
}
