Controlling external devices using COM port communications programmed using VB language
There are a lot of Radio amateurs that want to control external devices using computer standard ports. One of them is the COM port. Everybody wants things to be easy as people doing electronics are more hardware people, not software. COM port is more often used than LPT because COM port is more resistive to bigger loads, and there are fewer chances of failing. So if you know Visual Basic a little bit, then this shouldn’t be tough to use the MSComm Control component, located in Project->Components. You should check box MSComm Control. Later you have to add this control to the form and write some code for it.
