How do I set the compress bit for a file using a PS script?

how set compress bit file using ps script?  i'd to compress files in folder with a script like gci | compress-item (made up).

thank you.

as quick way set ntfs compression (not zip), i'll use compact.exe command in powershell. example:

  $cmd = "compact.exe /c /s:myfile.txt" cmd /c $cmd   

Windows Server  >  Windows PowerShell