I created a excel.application and also a workbook and worksheet. I get the data from the database and write those data to the excel sheet I created.

After write, I want to close the application. So I use "Set xlapp=Nothing" to delete the applicaation. But I met a problem: when the data in the excel file is little, I can close the application successfully; while when the data in the excel file is much more, I cann't delete the application, after I run "Set xlapp=Nothing", and then I press "Ctrl+Alt+Del", I still can see the excel process in the process list.

Who can tell me how can I delete the excel application completely?

Thank you very much!