Clear the "new mail envelope" from outlook taskbar in VSTO - vb.net

Question

I've got an add-in that processes and then moves certain incoming emails. The only unfortunate consequence of this is that the "new mail envelope" on the taskbar:
remains lit when there isn't any mail for the user to look at.
There's a VBA solution to this issue here: http://www.outlookcode.com/d/code/clearenvicon.htm
It doesn't seem easily portable to VB though - after clearing up what were to me the obvious changes suggested I end up with:
Module RemoveNotification
' Code sample by Outlook MVP "Neo"
' Removes the New Mail icon from the Windows system tray,
' and resets Outlook's new mail notification engine.
' Tested against Outlook 2000 (IMO) and Outlook 2002 (POP Account)
' Send questions and comments to neo#mvps.org
' WARNING: Due to the use of AddressOf, code must
' go into a module and not ThisOutlookSession or
' a class module
' Entry Point is RemoveNewMailIcon.
Public Const WUM_RESETNOTIFICATION As Long = &H407
'Required Public constants, types & declares
'for the Shell_Notify API method
Public Const NIM_ADD As Long = &H0
Public Const NIM_MODIFY As Long = &H1
Public Const NIM_DELETE As Long = &H2
Public Const NIF_ICON As Long = &H2 'adding an ICON
Public Const NIF_TIP As Long = &H4 'adding a TIP
Public Const NIF_MESSAGE As Long = &H1 'want return messages
' Structure needed for Shell_Notify API
Structure NOTIFYICONDATA
Dim cbSize As Long
Dim hwnd As Long
Dim uID As Long
Dim uFlags As Long
Dim uCallbackMessage As Long
Dim hIcon As Long
Dim szTip As String * 64
End Structure
Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Long, ByVal wMsg As Long,
ByVal wParam As Integer, ByVal lParam As Any) As Long
Declare Function GetClassName Lib "user32" _
Alias "GetClassNameA" _
(ByVal hwnd As Long,
ByVal lpClassName As String,
ByVal nMaxCount As Long) As Long
Declare Function GetWindowTextLength Lib "user32" _
Alias "GetWindowTextLengthA" _
(ByVal hwnd As Long) As Long
Declare Function GetWindowText Lib "user32" _
Alias "GetWindowTextA" _
(ByVal hwnd As Long,
ByVal lpString As String,
ByVal cch As Long) As Long
Declare Function EnumWindows Lib "user32" _
(ByVal lpEnumFunc As Long,
ByVal lParam As Long) As Long
Declare Function Shell_NotifyIcon Lib "shell32.dll" _
Alias "Shell_NotifyIconA" _
(ByVal dwMessage As Long,
lpData As NOTIFYICONDATA) As Long
Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String,
ByVal lpWindowName As String) As Long
' This is the entry point that makes it happen
Sub RemoveNewMailIcon()
EnumWindows AddressOf EnumWindowProc, 0
End Sub
Public Function EnumWindowProc(ByVal hwnd As Long,
ByVal lParam As Long) As Long
'Do stuff here with hwnd
Dim sClass As String
Dim sIDType As String
Dim sTitle As String
Dim hResult As Long
sTitle = GetWindowIdentification(hwnd, sIDType, sClass)
If sTitle = "rctrl_renwnd32" Then
hResult = KillNewMailIcon(hwnd)
End If
If hResult Then
EnumWindowProc = False
' Reset the new mail notification engine
Call SendMessage(hwnd, WUM_RESETNOTIFICATION, 0&, 0&)
Else
EnumWindowProc = True
End If
End Function
Private Function GetWindowIdentification(ByVal hwnd As Long,
sIDType As String,
sClass As String) As String
Dim nSize As Long
Dim sTitle As String
'get the size of the string required
'to hold the window title
nSize = GetWindowTextLength(hwnd)
'if the return is 0, there is no title
If nSize > 0 Then
sTitle = Space$(nSize + 1)
Call GetWindowText(hwnd, sTitle, nSize + 1)
sIDType = "title"
sClass = Space$(64)
Call GetClassName(hwnd, sClass, 64)
Else
'no title, so get the class name instead
sTitle = Space$(64)
Call GetClassName(hwnd, sTitle, 64)
sClass = sTitle
sIDType = "class"
End If
GetWindowIdentification = TrimNull(sTitle)
End Function
Private Function TrimNull(startstr As String) As String
Dim pos As Integer
pos = InStr(startstr, Chr$(0))
If pos Then
TrimNull = Left(startstr, pos - 1)
Exit Function
End If
'if this far, there was
'no Chr$(0), so return the string
TrimNull = startstr
End Function
Private Function KillNewMailIcon(ByVal hwnd As Long) As Boolean
Dim pShell_Notify As NOTIFYICONDATA
Dim hResult As Long
'setup the Shell_Notify structure
pShell_Notify.cbSize = Len(pShell_Notify)
pShell_Notify.hwnd = hwnd
pShell_Notify.uID = 0
' Remove it from the system tray and catch result
hResult = Shell_NotifyIcon(NIM_DELETE, pShell_Notify)
If (hResult) Then
KillNewMailIcon = True
Else
KillNewMailIcon = False
End If
End Function
End Module
Which gives the below errors & warnings:
Severity Code Description Line
Error BC30205 End of statement expected. 35
Error BC30800 Method arguments must be enclosed in parentheses. 73
Error BC30828 'As Any' is not supported in 'Declare' statements. 40
Error BC30581 'AddressOf' expression cannot be converted to 'Long' because 'Long' is not a delegate type. 73
Error BC30277 Type character '$' does not match declared data type 'Char'. 129
Warning BC42104 Variable 'sIDType' is used before it has been assigned a value. A null reference exception could result at runtime. 85
Warning BC42104 Variable 'sClass' is used before it has been assigned a value. A null reference exception could result at runtime. 85
Warning BC42109 Variable 'pShell_Notify' is used before it has been assigned a value. A null reference exception could result at runtime. Make sure the structure or all the reference members are initialized before use 145