batch.cmd

powershell -file c:\temp\script.ps1 -test:%1
echo %ERRORLEVEL%

console.txt

//Calling batch file with argument, which gets passed to the ps1 script
c:\Temp>batch.cmd asdf

//asdf came from %1 argument to batch.cmd
c:\Temp>powershell -file c:\temp\script.ps1 -test:asdf
asdf

//%ERRORLEVEL% has exit code from ps1 file
c:\Temp>echo 5
5

//Add this to the end of the batch.cmd if you want error code passed to calling processes
exit %ERRORLEVEL%

script.ps1

Param(
  [string]$test
)

write-host $test

exit 5

using Call in a cmd file is where I was running into issues.

call "someprocess" %*

Say that process allowed you to pass /? as the argument.

Give it a shot and it will ALWAYS output the help from call instead of passing the argument through to the process.