Hi,

I am trying to read a buffer from a file and then pass that buffer to a
C++ dll as follows. While debugging it tells me that byte array
received is a Bad Ptr. Any help will be appreciated.

VB code:

Dim bytes(511) As Byte
Dim stream As Stream
Dim bytesReadFromStream As Integer


        stream = New FileStream("C:\abc.bak", FileMode.Open,
FileAccess.Read)

        bytesReadFromStream = stream.Read(bytes, 0, 512)

    While bytesReadFromStream > 0

                SendBytesToFn(bytesReadFromStream , bytes)

        bytesReadFromStream = stream.Read(bytes, 0, 512)

    End While

    stream.Close()



<System.Runtime.InteropServices.DllImport("MyDll.dll",
CharSet:=System.Runtime.InteropServices.CharSet.Auto)> _
    Private Sub SendBytesToFn(ByVal bytesTransferred As Int64, ByVal
bytes() As Byte)

    End Sub


C++ Code:

extern "C" MYDLL_API void SendBytesToFn(DWORD bytesTransferred, BYTE*
bytes)
{
    // bytes here come as Bad Ptr

}

                                                         ^^^^^

Should be an Int32 (or UInt32).


Mattias

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