>Hi everybody,
>
>I am wondering if anyone of you has experience making C# dll to be accessible from VFP using DllExport utility. In particular, I am interested in passing parameters by reference.
>
>I made a simple function in C#
>
>

>[DllExport("CheckParamsByRef", System.Runtime.InteropServices.CallingConvention.StdCall)]
>        /// <summary>
>        /// CheckParamsByRef
>        /// <param name="test">The string to return by reference</param>
>        public static int CheckParamsByRef(ref String test)
>        {
>            test = "Hello from C#";
>            return 1;
>        }
>

>
>and try to call it from VFP
>
>

>DECLARE integer CheckParamsByRef IN "MyDLL x86.dll" ;
>    string @ 
>ReturnValueText = ""
>    ? CheckParamsByRef(@ReturnValueText)
>    ? 'ReturnValueText: ' + ReturnValueText

>
>On the ? CheckParamsByRef call I'm getting exception from DLL.
>
>Does it mean we can not use DllExport and passing parameters by reference? Is there any way around the problem?
>
>Thanks in advance.

Why bother exporting? AFAIR you can use standard interop and get the DLL by using CreateObject() in VFP