sorry, they aren't doing anything through code. They are going to the File menu in Word, choosing open, then opening a spreadsheet file. (Filename.xls) Word then pops up a dialog box titled "Open Worksheet" where they could cancel if they were awake, but they click ok. Then when Word opens the file, Word changes the file to a table format automatically. The user sees that it's the wrong file, closes the file and clicks on yes when it asks if they want to save the file. Again, if they'd just click on no, we'd be ok.
I could add a procedure to normal.dot to hijack the FileOpen command and if the last 3 charcters of the filename are xls, just close the file and throw up an error message. But I was hoping that there was a way to just turn off the feature of Word that throws up the dialog box "Open Worksheet" and would instead give an error message.