How to scan a specific folder for the existance of a PDF before saving

Question

I created a folder level function for saving a file by passing it a name and a path.  The problem is I don't want to allow the user to overwrite a file of the same name.  I would rather want to append a version number to it's name so I can keep track of the evolution of the form.
I'm thinking about a script to scan the folder for the occurrence of a file and returns something or throws an error.  I experimented with app.browseForDoc() but I don't want the dialog box to show.
I would use a do/while loop to appends a version number and then look for the file until I get a specific return value or error indicating that the file is not present (or in my case that the name is not already used).

Answer 1

I think I have just the answer, I still need to try it though.  I forgot about prompting the user for appending version numbers because it would mean he'd have to cancel a bPromptToOverwrite box for each version present in the folder.  That's way too many boxes.
BUT....;o)
I needed a way to prevent overwriting which is the first concern.  What I'm looking for is a way to:
1-stop my save script before overwiting;
2-Append version number if script stops and launch save script again;
One way to stop the script is when an error is thrown.  I'm thinking about saving the file as a copy with the bCopy parameter and adding a DOS script to the folder that would monitor in real time the attributes of all files and turn it to read-Only.  That way, if I run my save function and reader tries to overwrite a file, it will throw an error.  I will modify my save function to return a boolean named successfulSave.  Using a try/catch handler, I will append a version number to the file name and call the save function again.  I will encapsulate this in a do/while loop until successfullSave is true.