VS2015 应用程序在调用具有委托C++函数时崩溃

我正在使用ABBYY的FineReader引擎，当尝试初始化时，我的应用程序崩溃了(在调试时)。如果我运行.exe它工作正常。

声明：

<DllImport("kernel32.dll")>
Private Shared Function LoadLibrary(dllToLoad As String) As IntPtr
End Function
<DllImport("kernel32.dll")>
Private Shared Function GetProcAddress(hModule As IntPtr, procedureName As String) As IntPtr
End Function
<DllImport("kernel32.dll")>
Private Shared Function FreeLibrary(hModule As IntPtr) As Boolean
End Function
' FREngine.dll functions
<UnmanagedFunctionPointer(CallingConvention.StdCall, CharSet:=CharSet.Unicode)>
Private Delegate Function GetEngineObject(devSN As String, reserved1 As String, reserved2 As String, ByRef engine As FREngine.IEngine) As Integer
<UnmanagedFunctionPointer(CallingConvention.StdCall)>
Private Delegate Function DeinitializeEngine() As Integer
<UnmanagedFunctionPointer(CallingConvention.StdCall)>
Private Delegate Function DllCanUnloadNow() As Integer

并初始化：

' Load the FREngine.dll library
dllHandle = LoadLibrary(enginePath)
Try
If dllHandle = IntPtr.Zero Then
Throw New Exception("Can't load " + enginePath)
End If
Dim getEngineObjectPtr As IntPtr = GetProcAddress(dllHandle, "GetEngineObject")
If getEngineObjectPtr = IntPtr.Zero Then
Throw New Exception("Can't find GetEngineObject function")
End If
Dim deinitializeEnginePtr As IntPtr = GetProcAddress(dllHandle, "DeinitializeEngine")
If deinitializeEnginePtr = IntPtr.Zero Then
Throw New Exception("Can't find DeinitializeEngine function")
End If
Dim dllCanUnloadNowPtr As IntPtr = GetProcAddress(dllHandle, "DllCanUnloadNow")
If dllCanUnloadNowPtr = IntPtr.Zero Then
Throw New Exception("Can't find DllCanUnloadNow function")
End If
' Convert pointers to delegates
_getEngineObject = DirectCast(Marshal.GetDelegateForFunctionPointer(getEngineObjectPtr, GetType(GetEngineObject)), GetEngineObject)
_deinitializeEngine = DirectCast(Marshal.GetDelegateForFunctionPointer(deinitializeEnginePtr, GetType(DeinitializeEngine)), DeinitializeEngine)
_dllCanUnloadNow = DirectCast(Marshal.GetDelegateForFunctionPointer(dllCanUnloadNowPtr, GetType(DllCanUnloadNow)), DllCanUnloadNow)
' Call the GetEngineObject function
Dim hresult As Integer = _getEngineObject(developerSN, Nothing, Nothing, m_engine)

最后一行是导致崩溃的那一行(无错误或输出)。相同的代码在VS2010中工作正常，但在VS2015中则不然。我在这里错过了什么？