MsgBox.exe : Displays some text in a message-box

• Displays "Service not started" in a message-box. "Warning" is the title:
  msgbox -t:Warning "Service not started"
• Displays the content of file "warning.txt". Title of the message-box is "Warning: service not started.":
  msgbox -t:"Warning: service not started." -f:warning.txt
  
• Displays the content of file "warning.txt". Icon is set to "Error", and title of the message-box is "Warning: service not started.":
  msgbox -i:error -t:"Warning: service not started." -f:warning.txt