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How to take a VB.Net application to the web

Have a VB.Net application and want to run in on the web?

Thinfinity VirtualUI is a windows software virtualization solution. By adding a piece of code to your VB.Net application’s source you can then run it within a web browser and access it from any OS. Run your regular desktop applications from your browser, without even having to install them on the computer!

Let’s learn more about this HTML5 solution for VB.Net applications!

How to run VB.Net development as web app

Ready to start? First, check that you’re running the latest version of Thinfinity VirtualUI. Then download an example for web-enabling VB.Net and in the download link below:


Bear in mind in this example we’ve already added Thinfinity.VirtualUI.vb. You can find this in “C:\Program Files\Thinfinity\VirtualUI\dev\dotNET” so you can include it to your app.

To ensure your application loads fine with VirtualUI on the web, we recommend starting VirtualUI right at the begging. In the example, you’ll see that we’ve created a module called ‘Startup.vb’ that makes the virtualui.start():

Turn your VB.Net application to a Web App

Module Startup

Dim virtualui As New Cybele.Thinfinity.VirtualUI()
Sub Main()


”// virtualui.ClientSettings.MouseMoveGestureAction = MouseMoveGestureAction.MM_ACTION_WHEEL
Application.Run(New Form1())

End Sub
End Module

And this is the startup object:

Turn your VB.Net application to a Web App

If you start the app in the IDE now, you should get a pop-up to start the web browser:

Turn your VB.Net application to a Web App

And finally be able to see the app in the browser, like this:

Turn your VB.Net application to a Web App

Keep in mind, this is running in the ‘Development environment’, based on the screenshot above you can see it is calling port 6080, which is the default port of the development server. You will have to port the .exe to the “production” server, which listens on port 6580.

Adding the app to the server environment is very simple the Application tab add a new profile:

Turn your VB.Net application to a Web App

In this window, we will configure the VB.Net app. Here is an example:

Turn your VB.Net application to a Web App

“Name”: The name you want the Web Application to display.

“Program path and file name”: Click open and select the .exe compiled with the Startup for VirtualUI

“Arguments”: Add any argument your app might need.

Under the “Credentials” tab, configure a user that has read and write permission where your app is located:

Turn your VB.Net application to a Web App

And under the Permissions tab, for testing purposes, click on “Allow anonymous access”:

Turn your VB.Net application to a Web App

Click “OK”, and then click “Apply”.
Open a new browser window and navigate to
You will find the Thinfinity VirtualUI landing page, and your application published on it. Congrats!

Would you like to have a private demo? There’s no compromise and no cost. We will be happy to show up our solutions to you and your team. Contact us to get a demo. We will schedule a moment at your earliest convenience.

Got questions? Send us a message at support@cybelesoft.com or leave a message on this same post.

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Comments (2)

I have done this setup but observing 740 error. Please advise what setting i need to turn off on Windows 2012 server Machine

Hi Bharatraj,

740 errors are usually related to permissions related to the Windows user that is trying to access an application which doesn’t have permission to.

Please, send me an email to support@cybelesoft.com in order to follow this issue more closely.

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