how to elevate administrator pirivileges only when required vb.net

Question

I want to make an application with self-update function.

Unfortunately, when I want to click on the button called "Update" it throws an error, with the message: "Access Denied!"

Here is the code I used:

Public Sub versionfileUPDATE()
    Try
        If System.IO.File.Exists(My.Settings.telepitesihely & "/seemtahelperv1downloader.exe") Then
            System.IO.File.Delete(My.Settings.telepitesihely & "/seemtahelperv1downloader.exe")
            Threading.Thread.Sleep(500)
            client.DownloadFileAsync(New Uri("https://dl.dropboxusercontent.com/s/azz6qundbe2rna1/SeeMta%20PK%20Generator%20V1.exe?dl=11"), My.Settings.telepitesihely & "/seemtahelperv1downloader.exe")
        Else
            client.DownloadFileAsync(New Uri("https://dl.dropboxusercontent.com/s/azz6qundbe2rna1/SeeMta%20PK%20Generator%20V1.exe?dl=1"), My.Settings.telepitesihely & "/seemtahelperv1downloader.exe")
        End If
    Catch ex As Exception
        MsgBox(ex.Message)
    End Try
End Sub

So, is there any solution to require administrator privilege, when the user clicks on the update button?