Esteemed Forum Participants and Lurkers:
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EXCEL SaveAs Function Returns

I'm doing a SaveAs in my EXCEL VBA program:

aworkbook.SaveAs fileName:="TEST.xls"

If the file already exists, a modal dialog box pops up with the message:

A file named 'TEST.xls' already exists in this location. Do you want to replace it?

... and 3 buttons: Yes No Cancel

If Yes is selected, the program continues normally.
If No or Cancel is selected, the program aborts into MS Visual Basic with the message:

Run-time error '1004': Method 'SaveAs' of object '_Workbook' failed

How can I determine the returns from the No and Cancel buttons and process these returns in my program without having the program abort?

Thank you for your gracious comments, suggestions, and assistance.