Windows log growth check ?

[alientm]

Logs with a date in the name, for example:
C:\FTP\DATA\logs\RD170901.log
C:\FTP\DATA\logs\RD170902.log
C:\FTP\DATA\logs\RD170903.log
...

I can check the file size:
vfs.file.size [C:\FTP\DATA\logs\RD170901.log]

How to check the file name when the name changes every day?

how to check the file is growing? (then I know that the application works)
*
Thank you in advance for your help.

[alientm]

Is there a simple solution to this problem?