This function sets how the printer should handle if a file with the same name as the new output file already exists in the output directory.
SetExistingFileAction(pDevMode As Long, iValue As Long) As Boolean
Input value - handle to the BlackIceDEVMODE structure
Input value -one of the following values:
0: Append the new document to the end of the existing document, if the file format allows it.
1: Delete the existing file, and generate the new output document with the same filename.
2: Leave the existing file, and rename the new output document by appending a number to the end of the file.
For example: Document (2).pdf, Document (3).pdf.
Return value - TRUE on success, FALSE otherwise.
NOTE: For 32-bit applications, use pDevMode as Integer, instead of Long.