i want to make small project which can interface hardware with vb.net software.

[tejasjoshi1]

i have make 1 form in vb.net which has 1 button.i have 1 circuit which can glow a led or bulb.i want that whenever i click on that button it can pass signal to the circuit & glow the led.how can i do this.reply.....

[code green]

How is the circuit connected to the PC?