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How to: Show Available Serial Ports in Visual Basic. 2 minutes to read. Contributors.
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In this article This topic describes how to use My.Computer.Ports to show the available serial ports of the computer in Visual Basic. To allow a user to select which port to use, the names of the serial ports are placed in a control. Example This example loops over all the strings that the My.Computer.Ports.SerialPortNames property returns. These strings are the names of the available serial ports on the computer. Typically, a user selects which serial port the application should use from the list of available ports. In this example, the serial port names are stored in a control. For more information, see.
Sub GetSerialPortNames ' Show all available COM ports. For Each sp As String In My.Computer.Ports.SerialPortNames ListBox1.Items.Add(sp) Next End Sub This code example is also available as an IntelliSense code snippet. In the code snippet picker, it is located in Connectivity and Networking. For more information, see. Compiling the Code This example requires:. A project reference to System.Windows.Forms.dll. Access to the members of the namespace.
Add an Imports statement if you are not fully qualifying member names in your code. For more information, see. That your form have a control named ListBox1. Robust Programming You do not have to use the control to display the available serial port names. Instead, you can use a or other control. If the application does not need a response from the user, you can use a control to display the information.
Hi, Brandon110 I was interested in the title of your post 'cause I've been there a long time ago. IMO, the QueryDosDevice example suggested by Sheng Jiang seems to be one of possible solutions. (But don't use the sample code as it is 'cause it has a minor bug in it - it assumes that any device name starts with 'com' should be the name of a COM port, which is not always true.) It's a bit complicated to get the list of physical COM ports and the most popular way of getting it is to rely on the registry information like Hans suggested above.
If you're not familiar with retrieving the registry information, the following straightforward but a bit tedious example can be one of your choices. Thanks, i appreciate the help. But when I compile it I get 34 errors. Am I missing something?
Duh!:P I'm actually working on a project for a robot. It creates sequences for the servos and stores them for playback. I have about 3 years experience with programming, but I just started C. I'm still getting used to it. Edit: I put it in a.cpp file and it has 1 error: Error 1 fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include 'stdafx.h' to your source? C: Users Brandon Documents Visual Studio 2008 Projects Mini-Sequencer Mini-Sequencer Comports.cpp 37 And when I included the stdafx.h file it gives me like 30 errors.