表格编程，实现和Excel差不多一样的功能，可以实现图表显示-Form programming, implementation, and Excel is almost the same function, can realize the chart show

导出DBGridEh表格数据到excel的空间，支持多表头，其中用到了xlsreadwrite控件-Export data to excel spreadsheet DBGridEh space, support multi-table first, which uses a control xlsreadwrite