Web browser control loading Outlook unusable VB.Net

Question

I have a web browser control that is added to a user control and is automatically made to navigate to a specific URL when an email is selected (lets say https://www.google.com). Whilst the navigation is going on, when clicking through emails, it slows down the actual performance of Outlook and outlook waits for the page to load. Is there a way I could carry out this navigation in the background without actually affecting the performance of Outlook when clicking through various emails?

Thanks.

Update:

AddIn Startup Code:

 Private Sub ThisAddIn_Startup() Handles Me.Startup

        myUserControl1 = New OutlookTaskPane
        myUserControl1.TabStop = True
        Dim width As Integer = myUserControl1.Width
        myCustomTaskPane = Me.CustomTaskPanes.Add(myUserControl1, "Title")
        myCustomTaskPane.Width = width
        myCustomTaskPane.Visible = True
        myCustomTaskPane.DockPositionRestrict = Microsoft.Office.Core.MsoCTPDockPositionRestrict.msoCTPDockPositionRestrictNoChange

        currentExplorer = Me.Application.Explorers.Application.ActiveExplorer
        AddHandler currentExplorer.SelectionChange, AddressOf myOutlookExplorer_SelectionChange
    End Sub

SelectionChange Code (On Email selection change):

Private Sub myOutlookExplorer_SelectionChange() Handles currentExplorer.SelectionChange
        Dim RandNum As Integer = myUserControl1.GetRandomNumber(1, 100)
        ' Grid Loading Link
        myUserControl1.WebBrowser1.Navigate("https://www.google.com" & "?" & RandNum, Nothing, Nothing, "User-Agent:  Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko")
    End Sub

Document Completed Code:

Private Sub WebBrowser1_DocumentCompleted(sender As Object, e As WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
        ' If the document is not completely ready, then don't perform the events below
        If Not WebBrowser1.ReadyState = WebBrowserReadyState.Complete Then
            Return
        End If
.... // lots of field setting/DOM manipulation after the DOM is loaded
End Sub

Answer 1

I suppose you are using System.Windows.Forms.WebBrowser.

There is a Stop() method you could try to call before you request a new Navigate(String).