Cefsharp download window for showing progress in VB.Net - vb.net

Question

I am creating a browser using Cefsharp in VB.Net, and I have been trying to create a download window that shows the progress of the current download. I don't know if I am doing something wrong or if it is the way CEF works, but I put in a download handler by adding browser.DownloadHandler = New DownloadHandler to Form1_Load and creating a new class like this (with downloading being the form I created for showing the progress):
Public Class DownloadHandler
Implements IDownloadHandler
Public Function OnBeforeDownload(downloadItem As DownloadItem, ByRef downloadPath As String, ByRef showDialog As Boolean) As Boolean Implements IDownloadHandler.OnBeforeDownload
downloadPath = downloadItem.SuggestedFileName
showDialog = True
downloading.Show()
Return True
End Function
Public Function OnDownloadUpdated1(downloadItem As DownloadItem) As Boolean Implements IDownloadHandler.OnDownloadUpdated
My.Settings.downloadpercent = downloadItem.PercentComplete.ToString
Return False
End Function
End Class
On the downloading form I have this code for showing the progress:
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
Dim percentcomplete As Integer = My.Settings.downloadpercent * 5
Me.PictureBox1.Size = New Size(percentcomplete, 25)
End Sub
Private Sub downloading_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Timer1.Start()
End Sub
This may not be the best way to show a ProgressBar, but I have a picture box that just has a green bar, and the total width of the form is 500px. The code is telling it to read the PercentComplete setting put in My.Settings.downloadpercent, multiply it by 5, so when the progress in 100%, it will go across the whole form.
The problem is that the ProgressBar is not being updated to show the current progress. It goes a little bit, but then it just stops. Am I doing something wrong, or is OnDownloadUpdated not a good place to put that? Any suggestions of how to fix this?
Edit:
I am using CefSharp 39.0.0-pre03. Also, when the save file dialog comes up, no matter if you click Save or Cancel, the browser always triggers a LoadError, so it loads the custom HTML error page I made, and since it requires a URL for loading HTML, I put in "http://rendering/"... So I guess that would be a domain change. That issue (in the comments) could be the problem, but then we also need to figure out why it is triggering a LoadError.

Answer 1

A simple solution that may be of interest to those who faced the same or similar problem:
Declare Public your Picturebox, in a module:
Module Module1
Public PictureBox1 As New PictureBox
End Module
In MainForm you can declare the attributes you want (after the InitializeComponent). Example:
With PictureBox1
.BorderStyle = Border3DStyle.Flat
.Image = Bitmap.FromFile(YourImageFileName)
'......
End With
In the DownloadHandler Class:
Public Function OnDownloadUpdated1(downloadItem As DownloadItem) As Boolean
Implements IDownloadHandler.OnDownloadUpdated
Dim percentcomplete As Integer=downloadItem.PercentComplete * 5
PictureBox1.Size = New Size(percentcomplete, 25)
Return False
End Function