How to get an object for the control present in an html element in WinForms HTMLUIControl?

//Initializing the respective control's object
private System.Windows.Forms.RadioButton htmlRadioButton;
private void htmluiControl1_LoadFinished(object sender, System.EventArgs e)
{
     //Collecting the html elements in a hashtable with their key as id
     Hashtable elements = this.htmluiControl1.Document.GetElementsByUserIdHash();
     BaseElement radioElem = (BaseElement)elements["radio1"];
     //Getting the Control from the html element and assigning it to the required object
     //The html element hereafter can be accessed with the help of the htmlRadioButton object
     htmlRadioButton = (RadioButton) this.htmluiControl1.Document.GetControlByElement(radioElem);
}

'Initializing the respective control's object
Private htmlRadioButton As System.Windows.Forms.RadioButton
Private Sub htmluiControl1_LoadFinished(ByVal sender As Object, ByVal e As System.EventArgs)
    'Collecting the html elements in a hashtable with their key as id
    Dim elements As Hashtable = Me.htmluiControl1.Document.GetElementsByUserIdHash()
    Dim radioElem As BaseElement = CType(elements("radio1"), BaseElement)
    'Getting the Control from the html element and assigning it to the required object
    'The html element hereafter can be accessed with the help of the htmlRadioButton object
    htmlRadioButton = CType(Me.htmluiControl1.Document.GetControlByElement(radioElem), RadioButton)
End Sub