I am using the following cmd to print the pdf:
acroRD32.exe /t \"file1.pdf\" \"printerName\"
Everything works fine but one window pops up.
I successfully tested forking a delayed kill command before starting the print job.
start cmd /c "timeout 15 & taskkill /f /im acrord32.exe" acroRD32.exe /t "file1.pdf" "printerName"