Hello,

c++ signature:

struct TickInfo
 {
  time_t ctm;
  char   symbol[8];
  double bid;
  double ask;
 };

__declspec(dllimport)
TickInfo* MtGetUpdatedTickInfo(const int handle,int *items);

my c# try:

    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi, Pack=8)]
    public struct TickInfo
    {
        public uint   ctm;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=8)]
        public string symbol;
        public double bid;
        public double ask;
    };

    [return: MarshalAs(UnmanagedType.LPArray, SizeParamIndex=1)]
    [DllImport "mtapi.dll",CallingConvention=CallingConvention.Cdecl)]
    public static extern TickInfo[]
    MtGetUpdatedTickInfo(int handle,[Out]out int items);

- - - - - - - - - - - - - - - - - -
problem:
System.Runtime.InteropServices.MarshalDirectiveException
_message "Can not marshal return value."

1) Does anybody know how to use marshaler properly in this case ?

2) I tried use IntPtr as return type and that worked, but I don't know
how to read data from IntPtr(as pointer to array of structs).

3) Is it possible to marshal it using atributes whenever c++ signature
  looks like:
void MtGetUpdatedTickInfo(const int handle,int *items,TickInfo**
array);

Thanks

Pavel Savara