Incorporating write-progress into this script

hi,

hope can help. i'm starting grips powershell scripting , have simple script here virtual directory information exchange. because of exchange servers in different sites, of commands take little while , i'd add write-progress each of commands can't head round how it. can helpw? script below.

$file1 ="c:\ps\after\vds.txt"  write-output "getting ews virtual directories"  get-webservicesvirtualdirectory | select-object name,server,internalurl,externalurl | fl | out-file $file1  write-output "getting owa virtual directories"  get-owavirtualdirectory | select name,server,internalurl,externalurl | fl | out-file $file1 -append  write-output "getting ecp virtual directories"  get-ecpvirtualdirectory | select name,server,internalurl,externalurl | fl | out-file $file1 -append  write-output "getting activesync virtual directories"  get-activesyncvirtualdirectory | select name,server,internalurl,externalurl | fl | out-file $file1 -append  write-output "getting oab virtual directories"  get-oabvirtualdirectory | select name,server,internalurl,externalurl | fl | out-file $file1 -append  write-output "all done"

in advance...

well issue write-progress need aware of how many things have able make right estimate.

so need run in loop can increment. way have set show progress base on tell him. 

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https://technet.microsoft.com/en-us/library/ff730943.aspx

Windows Server  >  Windows PowerShell