Passing a HANDLE* from VB.NET App to VC++ DLL

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I am trying to pass a pointer to a HANDLE (HANDLE*) to a VC++ DLL from VB.NET. I can do it in VB6, but all the changes in .NET are giving me a headache trying to figure it out.

Here is the VC++ prototype I am calling:

F32API F32STATUS WINAPI F32Open(DWORD dwDevice, HANDLE* cyHandle);

I have this function declared:

Public Declare Function F32Open Lib "F32.dll" (ByVal dwDevice As Long, _
        <MarshalAs(UnmanagedType.AsAny)> ByRef cyHandle As Object) As Integer
Public Declare Function F32Open Lib "F32.dll" (ByVal dwDevice As Long, _
        ByRef cyHandle As IntPtr) As Integer

And here is my calling code:

Private Sub LoadButton_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles LoadButton.Click

        Dim Status
        Dim hDevice

        Status = F32Open(0, hDevice)

        If Status <> F32SUCCESS Then
            MsgBox("Error opening device: 0")
        End If

End Sub

As you can see, in the declare, the first one that is commented out is trying to Marshal the data AsAny. Since a HANDLE is really just void*, I tried using this example from MS to help me: (http://msdn.microsoft.com/library/en-us/cpguide/html/cpconvoidsample.asp)
However, it is giving this error when I run the code:

An unhandled exception of type
System.Runtime.InteropServices.MarshalDirectiveException
occurred in F32.exe

Additional information: Can not marshal parameter #2:
The AsAny type can not be marshaled as byref or as an
unmanaged-to-managed parameter.

So my question is: How do I pass the HANDLE* to VC++ from VB.NET? Any help or links would be appreciated, I have been trying to figure this out for way too long.