Winforms - Selecting Files And Folders In A Folder?

I'm trying to select the files and folders inside a folder to zip up, but what it seems to be doing is selecting all the folders up to the folder i've selected and the files in the final folder but not the folders in there and zipping them up. So for example in tbFolder I have the string: "C:Users ombDesktopDeOldMota7" I want to select this folder and zip up the entire contents of this folder, images and all. But whats happening is the following:

Its creating the folder structure up to the folder i want zipped and adding just the files in side this and not the folders. I'm guessing I need to tweak the line:

System.IO.Directory.GetFiles(DirectoryToZip)

Here is the entire code:

Private Sub btnCreate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCreate.Click
Dim ZipFile As String = "C:Releases" & drpService.Text & "-" &

[Code].....