原始帖子在：
http://www.cnblogs.com/fox23/archive/2008/12/24/windows-mobile-ril-in-compact-framework.html
原始的C#代码：
http://files.cnblogs.com/fox23/CellIDSample.rar
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我把其中的一个RILHelper.cs 转为 RILHelper.vb，转换之后有3处错误见红色和黑体部分，代码如下，这个是在compact framework下的，不过应该和.net是一样的，可能是哪里定义错误了，请大家帮忙debug一下.
Imports System.Runtime.InteropServices
Imports System.Threading
Namespace RILDriver
Friend Class RILHelper
<DllImport("ril.dll")> _
Private Shared Function RIL_Deinitialize(ByVal hRil As IntPtr) As IntPtr
End Function
<DllImport("ril.dll")> _
Private Shared Function RIL_GetCellTowerInfo(ByVal hRil As IntPtr) As IntPtr
End Function
<DllImport("ril.dll")> _
Private Shared Function RIL_Initialize(ByVal dwIndex As UInt32, ByVal pfnResult As RILRESULTCALLBACK, ByVal pfnNotify As RILNOTIFYCALLBACK, ByVal dwNotificationClasses As UInt32, ByVal dwParam As UInt32, <Out()> ByRef lphRil As IntPtr) As IntPtr
End Function
Public Delegate Sub RILNOTIFYCALLBACK(ByVal dwCode As UInt32, ByVal lpData As IntPtr, ByVal cbData As UInt32, ByVal dwParam As UInt32)
Public Delegate Sub RILRESULTCALLBACK(ByVal dwCode As UInt32, ByVal hrCmdID As IntPtr, ByVal lpData As IntPtr, ByVal cbData As UInt32, ByVal dwParam As UInt32)
' Methods
Public Shared Function GetCellTowerInfo() As String
Dim hRil As IntPtr = IntPtr.Zero
Dim hRes As IntPtr = IntPtr.Zero
RILHelper.celltowerinfo = ""
'错误:“rilResultCallback”是一个类型，不能用作表达式。
If (RIL_Initialize(1, New RILRESULTCALLBACK(AddressOf rilResultCallback), Nothing, 0, 0, hRil) <> IntPtr.Zero) Then
Return "Failed to initialize RIL"
End If
hRes = RIL_GetCellTowerInfo(hRil)
waithandle.WaitOne()
