Passing byte array from C# to C++

[Ollie]

Hi, Have a little trouble passing a byte array in C# into a C++ implemented web service, the C# code is:- FileStream fs = new FileStream("c:\\work\\temp\\Waremouse.mp3", FileMode.Open); BinaryReader Reader = new BinaryReader(fs); Reader.BaseStream.Seek(0, SeekOrigin.Begin); long lLength = Reader.BaseStream.Length; Int32 nLength = System.Convert.ToInt32(lLength); byte[] bData = Reader.ReadBytes(nLength); fs.Close(); //********************************************** //C++ Web Service....... m_FileServer.UploadFile("Waremouse.mp3", bData); //********************************************** The C++ is implement as COM interface as shown below __interface IFBFileServerService { //Uploads a file onto the web server.... [id(1)] HRESULT UploadFile([in] BSTR bstrFileName, [in] byte* bData); //Downloads a file from the web server... [id(2)] HRESULT DownloadFile([in] BSTR bstrFileName, [out, retval] byte** bData); }; The problem is that an exception is thrown in the client application Cheers for any help :confused: