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SerialPortMscommVisual Basic for Applications Serial Port Software Example. Visual Basic is used for many control applications, from simple communications, to elaborate test. Serial Port Programming With. NET 6 Steps. We need to include two namespaces in order to use the Serial. Port class using System. IO. Ports using System. IO We now need to instantiate a Serial. Port object. There are several constructors to choose from to specify different frame formats but in general the easiest to use is the following Serial. Portstring port. Name, int baud. RateAn example of this would be Serial. Port my. Serial. Port new Serial. Port COM3, 9. 60. Here I am using COM3 at 9. You can find the full list of constructors in the link in the intro. Now that we have created our Serial. Port object, we need to open the port using the Open method. When we are done we will want to close it using the Close method my. Restaurant Menu Engineering Software there. Serial Port Mscomm' title='Serial Port Mscomm' />Serial. Port. Open my. Serial. Port. Close Several notes when you use any operation that uses a serial port there is a good chance that an error will occur. For this reason we want to write our code for the serial port within a try catch block. This will prevent our program from crashing if, for example we tried to open a port that didnt exist. It is not necessary to instantiate our object within the try catch block, but we want to open, close, read, and write within it. Serial. Port object then opens and closes the port. AmNwyRdcl60/maxresdefault.jpg' alt='Serial Port Mscomm' title='Serial Port Mscomm' />Serial. Port my. Serial. Port new Serial. Port COM3, 9. 60. Serial. Port. Open my. Serial. Port. Close catch IOException exConsole. Write. Lineex Thats really all there is for port setupConnecting external electonics using the serial port. For hobbyists and educators. Hi, I am using PB 12. Classic Build 4098. We have several applications that use handheld scanners Honeywell 48. The scanners connect via USB port, but. In the next step we will introduce how to read from a serial port.