Excluding a Tab from a Folder Programmatically

[James Zukowski]

Is there a way to prevent a tab on a folder from being created based on Pre-Display factors? Example: Prevent the tab from being created based on whether contingent files exist. If the file(s) exist, create the tab, else skip it.
Thanks!

v13.10 almost on v17
Linux RH

[Jane Raymond]

After the folder has been drawn (like in the Post-Display logic of the main panel) you can drop or disable a tab.
e.g.
fldr'droptab(3) ! drops the third tab
fldr'disabletab(1) ! disables the first tab

[James Zukowski]

Look like what I need. Thank you!