Display progress bar based on download called by another class - vb.net

Question

I have a windows form which has a download button. The download button creates another class' object and this object triggers the download. I have created a progress bar in the main windows form and want this progress bar to update as the file gets downloaded.
The main windows form calls the object as below :
Dim dwObj= Downloader()
dwObj.DownloadFileFromLocation(fileName, fileType)
The DownloadFileFromLocation method is defined as below in the Downloader class :
Public Function DownloadFileFromLocation(FileName As String, FileType As String))
Dim Address As String = "MyLINK"
If (Not System.IO.Directory.Exists(MyLocalPath)) Then
System.IO.Directory.CreateDirectory(MyLocalPath)
End If
Try
Dim fileReader As New WebClient()
If (FileType.Equals(MyFileType)) Then
If Not (System.IO.File.Exists(MyLocalPath + FileName)) Then
AddHandler fileReader.DownloadProgressChanged, AddressOf Download_ProgressChanged
fileReader.DownloadFile(Address, MyLocalPath + FileName)
End If
End If
If (FileType.Equals(AWSGlobals.DWC)) Then
If Not (System.IO.File.Exists(AWSGlobals.DWPath + FileName)) Then
fileReader.DownloadFile(Address, AWSGlobals.DWPath + FileName)
End If
End If
Catch ex As HttpListenerException
Console.WriteLine("Error accessing " + Address + " - " + ex.Message)
Catch ex As Exception
Console.WriteLine("Error accessing " + Address + " - " + ex.Message)
End Try
End Function
Now, I have defined a function to update the progress bar, but since its in another file, I get an error :
Private Sub Download_ProgressChanged(sender As Object, e As DownloadProgressChangedEventArgs)
Try
ProgressBar1.Value = CInt(Math.Round((e.BytesReceived / e.TotalBytesToReceive) * 100, 0, MidpointRounding.AwayFromZero))
Catch ex As Exception
Debug.Print(ex.ToString)
End Try
End Sub
Now I get the error, which I understand because Progress bar is declared in the main windows form
ProgressBar1 is not declared. It may be inaccessible due to its protection level
The question is how can I handle this now. Can someone please help me out here?