Is there a property that I can read to find out if a file was specified to
open when starting Excel? In other words, if Excel was opened via the Start
menu (so the application opens, but no file is opened), or if Excel was
opened by double-clicking on an .xls file (so the application opens, then the
specified file opens).

The reason I would like to know is that I have created an .xls file, located
in my XLSTART folder, that provides some additional functionality not native
to Excel. When this file is not present, and I open Excel via the Start
menu, a blank worksheet is created. When the file is present, and I open
Excel via the Start menu, a blank worksheet is not created. I would like to
have the blank worksheet created when my file is present in the XLSTART
folder.

I know I can make this happen by placing the line
"Application.Workbooks.Add" in the "Workbook_Open" Application Event of the
file in XLSTART, but when Excel is opened by double-clicking on an .xls file,
a blank workbook is created as well, and I would prefer that not to happen.
If I could get an answer to my question, I would be able to add a workbook
only if Excel was opened without specifying a file. I cannot do this by
counting the number of open workbooks, because my file in XLSTART loads
before any other .xls file that may have been opened.

I hope I have described this clearly. If not, please let me know. Thanks
in advance for any help that may be forthcoming.

-Michael