Disabling/Enabling a serial port

[neffc]

I know how to do this through explorer and how to 'open' and 'close' IO to the serial ports but I actually want to disable them. How would I do this progmatically??

[valikac]

One solution is to disable the COM port. Check out this reference at MSDN. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/device\_management\_functions.asp I am not familiar with serial ports, but try openning a connection and keep it alive at all time. That may block any I/O. Kuphryn