Actually its not any specific device that i am trying to access. I develop my own robots and circuits and control them using a series of 0's and 1's. Lets say to active a motor first i need to send 1 through parallel port to the circuit which opens the gate and the motor driver circuit is turned on and thus motor begins to operate. How do i do this using USB?

Thanks for you reply.. Can u please send me a sample program for this... I am trying to send bits through USB and control the circuit directly... Actually I am doing it for Robotics, I have used Micro Controller for this but now i want to use computers to access them directly. Thanks

How can I send data bits through USB port? I am familiar with the parallel and serial port and have done some hardware controlling project through parallel port. But how do I send data through USB port using Visual C++?