usb communication

[jai_raj]

hai,

      i have controller with rs232 communiction. for that controller, i have source code for communicate between rs232 com port and apllication. The application written in labwindows/cvi5.5 . communication performance ok. But now i have advanced version of that controller with USB communication type. Controller functions remains same. only the communication port is different. Now i want to program to communicate that controller through USB(universal serial bus). along with the controller i have kit of USB driver also. only thing, i have to send and receive data through usb port. for that i have to program.  Dont worry about what type of controller. controller only send and receive data. and onemore thing is, controller will be serial input/output.Anybody can help me for this? thank you in advance. 

[RobertoBozzolo]

Please check what USB drivers are supposed to do with the controller. There is the possibility that the driver installs a virtual com port over the usb channel, in which case you have to do absolutely nothing except setting the appropriate port number.

[jai_raj]

thanks for ur reply. actually i want to know how to go rs232 to usb communication in labwindows cvi5.5. what are the libraries i have to use for usb communication? and also, In labwindows help menu,i have seen only rs232 related helps, nothing is there about usb communication. how can i get that?