Return the folder only given the full file path
The full file path
Return the trailing slash as part of the path
Convert forward slashes in the path to backslashes
FolderName = FolderNameFromPath("C:\Temp\TempFile.txt", True) ==> C:\Temp\
FolderName = FolderNameFromPath("C:\Temp\TempFile.txt", False) ==> C:\Temp