execute the transaction code thru the background process

Is there any way to execute the transaction code (e.g. /nVA03) with the script (BAT/CMD, VBS, PowerShell, SAP.NET) thru the task scheduler job and get success/failure results?

I have a PowerShell script that is created based on examples/suggestions I get on this forum. It's working fine but now when I tried to execute it from the task scheduler script not working. If I understand the issue is that SAP GUI cannot work in the background, is there any other approach/workaround?