An information processing apparatus that concurrently executes a plurality of application programs including first and second application programs on an operating system. The information processing apparatus monitors a function call from the first application program to the operating system or a message being sent and received between the first application program and the operating system. Then, based on the monitoring result, the information processing apparatus modifies or inhibits a function call from the second application program to the operating system or a process for sending and receiving a message between the second application program and the operating system. In this way, embodiments of the present invention control operations of the application program without modifying the existing operating system.