I am copying the contents of an Excel file onto the Clipboard within a program I have written. I can then use that data in memory rather than 'chatting' constantly with Excel.

When I have finished with the data, I cal a cleanup method that calls Clipboard.Clear() first and then closes all Excel sheets/workbooks/apps, etc.

The problem is, even though I clear the Clipboard prior to closing the Excel sheets, I get a pop up window still saying there is substantial amount of data on the clipboard. Anybody know why?