Powershell script waiting for user input and wont exit - powershell

Question

I am trying to run a script silently, its runs fine but then after its run it displays
Succeeded : 0
Press 'Enter' to continue
How can i check if succeeded and then send the enter key..
Note I am running this via the start process command as below but as it is waiting for the user to press enter it never exits:
Start-Process -Wait -FilePath "C:\windows\temp\abc.exe" -ArgumentList '/S','/v','/qn' -passthru

Answer 1

Your best bet is to check if your executable supports a command-line parameter (option) that skips the prompt at the end.
If there is none, you can try the following approach, but note that, as with all attempts to control an application via simulated user interaction, the solution is awkward and brittle:
# Comment this out to hide the verbose messages.
$VerbosePreference = 'Continue'
# Load helper assemblies.
Add-Type -ErrorAction Stop -AssemblyName Microsoft.VisualBasic, System.Windows.Forms
# Launch the external program.
# In this simple example, cmd.exe is invoked with its internal pause
# command, which waits for a keystroke to continue.
Write-Verbose 'Launching the external program asynchronously...'
# IMPORTANT: Do NOT use -Wait, as that will block execution
# indefinitely, and prevent you from sending the Enter keystroke.
$process = Start-Process -PassThru cmd '/c pause'
Write-Verbose 'Sleeping for as long as execution is expected to last at a minimum...'
Start-Sleep 5 # Adjust this as needed.
Write-Verbose 'Sending ENTER keystrokes until the window closes...'
while (-not $process.HasExited) {
# To be safe, activate the external program's window. If that fails, it must be closed already.
try { [Microsoft.VisualBasic.Interaction]::AppActivate($process.Id) } catch { break }
# Send the keystroke.
[System.Windows.Forms.SendKeys]::SendWait('{Enter}')
Start-Sleep -Milliseconds 200 # Sleep a little between attempts.
}
Write-Verbose 'The external program''s window is now closed.'