Hi,
I always tried and SEARCHED for this but low chances to find out the answer, an example. I try to DETECT whether 2 pins of COM port are connected or not. If you have at least very low electronics knowledge you'll understand this. It's like having a relay or button and bulb powered by a battery or something. if you PUSH the button, the CONTACT closes, it means the bulb lights. So, if you connect the wires to COM (2 pins) can you detect whether the contact closes? (pins are connected). I hope i have been clear. :)

yeah i read that before, i searched for this, like i said. the problem is i don't need null modem communication between computers. i need only to detect if 2 pins of the same COM port are directly connected.

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