Purpose
 You want to use the new WebView2 control instead of Internet Explorer. The WebView2 control uses Microsoft Edge (Chromium) as the rendering module to display the web content in native apps.

Solution
With GuiXT Controls you can embed any Windows Forms application into a SAP GUI screen. We can therefore create an application that uses the new WebView2 control and eventually use this application in the SAP GUI.

We will also implement methods that allow communication and exchange of data between GuiXT, the control as well as a displayed HTML page.

Example
There are various pages on the Internet that provide information about which browser is used, e.g. www.whatismybrowser.com.


(Click for fullscreen)

How to implement
 First create a Windows Forms application in which you use the new webView2 control. You can find instructions on how to do this, for example, here:
Get started with WebView2 in Windows Forms

The project is then compiled as a class library, giving us a .DLL file that we can use with GuiXT.
A more detailed example is described in the following tutorial:
Embedding windows forms with GuiXT

You can also download and customize the project for this example at the bottom of the page or just use the libraries.

Hint:
At the current time (August 2021), it is necessary to install either the developer version of the Edge browser or the WebView2 Runtime. It is expected that Microsoft will ship the control as part of regular updates in the future.
Exchange data between GuiXT and the webView2 control

GuiXT -> JavaScript

We can send any JavaSCript code as text to the current site in the webView2 control. This code can manipulate the DOM, read data or just call existing JavaScript functions. Please have a look at the InputScript "run_javascript.txt"

JavaScript -> GuiXT

There are several ways to send messages and data from JavaScript to the VB.NET control. One simple way is to call the following code:

window.chrome.webview.postMessage('Message from GuiXT');

The message is the handled in: 
  ' Recieve messages from JavaScript
    Private Sub WebView21_WebMessageReceived(...
You can access most of the GuiXT functions and variables in VB.NET then, please have a look here for further details:
Class "guixt" in VB
GuiXT Script

 title   "GuiXT Controls - webView2"
 
TextBox     (22,-0.8)     (27.1,68.3)     name= "mycode"
 
Pushbutton     (21,52)     "@ME@navigate to"     _ 
process= "navigate_to_url.txt"   size= (1,16)
   using  URL =  [myurl]
 
Pushbutton     (21,18)     "@OA@run javascript"   _ 
process= "run_javascript.txt"   size= (1,14)
 
Pushbutton     (21,34)     "@73@open debugmode"     _ 
process= "open_debugmode.txt"
 
InputField     (20,0)     "URL"     (20,18)  _ 
size= 50  name= "myurl"   default= "https://www.whatismybrowser.com/"
 
// area for VB.NET control.
Control   (-0.6,-0.8)   (18.7,124.5)  _ 
progid= "Shell.Explorer"   name= "r1"   initflag= "r1init"   -closeonhide
 
// embed control
if   V[r1init]
   callVB    guixt_webview2.webview2.setUserDir   dir:= "C:\guixtscripts"
   CallVB   guixt_webview2.webview2.embed   "&V[r1]"
endif
 
callVB   guixt_webview2.webview2.setSize   width:= 1000  height:= 500
InputScript "navigate_to_url.txt"
 Navigates to a given URL in the webView2 control

Parameter  URL
 
clear   V[r]
callVB  r =  guixt_webview2.webview2.navigate2   url:= "&U[URL]"
 
if   V[r]
   // Exception occured
   message   "&V[r]"   -statusline
endif
 
return
InputScript "open_debugmode.txt"
 Opens the debug window of the browser (F12 mode).

callVB   guixt_webview2.webview2.opendevmode  
return
InputScript "run_javascript.txt"
 Here JavaScript code can be executed from GuiXT on the loaded page.

callVB   guixt_webview2.webview2.injectJS   code:= "&text[mycode]"
return

VB.NET Coding
 

Imports guinet
Imports Microsoft.Web.WebView2.WinForms
Public Class webview2

    ' interface to GuiXT
    Private myguixt As guixt
    Private userDir As String = "C:\temp"

    ' Cache directory for the webVie2 control
    Public Sub setUserDir(dir As String)
        userDir = dir
    End Sub

    ' embed into SAP GUI window
    Public Sub embed(ByVal w As Object)
        guixt.EmbedForm(Me, w)
    End Sub

    ' Sets the size of the whole application
    Public Sub setSize(width As Integer, height As Integer)
        Me.Width = width
        Me.Height = height
    End Sub

    ' Open an URL in the webView2 control
    Public Function navigate2(url As String) As String
        Dim r As String = ""
        Try
            WebView21.CoreWebView2.Navigate(url)
        Catch ex As Exception
            r = ex.Message
        End Try
        Return r
    End Function

    ' Run some javaScript code in the control
    Public Sub injectJS(code As String)
        WebView21.CoreWebView2.ExecuteScriptAsync(code)
    End Sub

    ' Open F12 developer mode
    Public Sub openDevMode()
        WebView21.CoreWebView2.OpenDevToolsWindow()
    End Sub

    ' Recieve messages from JavaScript
    Private Sub WebView21_WebMessageReceived(sender As Object, _ 
       e As _ 
       Microsoft.Web.WebView2.Core.CoreWebView2WebMessageReceivedEventArgs) _ 
       Handles WebView21.WebMessageReceived

        ' Handle massages here
        MsgBox(e.TryGetWebMessageAsString)

    End Sub

    Private Sub webview2_Load(sender As Object, e As EventArgs) _ 
        Handles Me.Load
        InitializeAsync()
    End Sub

    Private Async Sub InitializeAsync()

        ' Important: Provide a caching directory for the control,
        ' default is path of the executable/dll
        ' -> SAP GUI directory if embedded with GuiXT 
        Try
            Dim createProps As New CoreWebView2CreationProperties
            createProps.UserDataFolder = Me.userDir
            WebView21.CreationProperties = createProps
            Await WebView21.EnsureCoreWebView2Async(Nothing)

        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub

End Class
Downloads

 VB.NET project
guixt_webview2.zip

Classlibraries only
guixt_webview2_dll.zip

GuiXT Scripts
guixt_webview2_scripts.zip

Components
 InputAssistant + Controls