Int32 GetStr( out String Str) no string out

[Arvidas]

Int32 GetStr( out String Str);
Not working, hangs or no Str change.

original:
//[DllImport("x32.dll",
// CallingConvention = CallingConvention.StdCall,
// CharSet = CharSet.Unicode,
// EntryPoint = "GetStr")]
//public static extern Int32 GetStr(
// [MarshalAs(UnmanagedType.BStr)] out String Str
// );

[zalintyre]

Can you provide your interface definition and the calling code?

[Arvidas]

    [LegacyDllImport("x32.dll")]
    public interface IGetStr : IDisposable
    {
        [LegacyDllMethod(CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Unicode)]
        Int32 GetStr( out String Str);
    }

 public static Int32 GetStr(ref String str)
{
  return = client.GetStr(out s);
}

String s = ""
GetStr(ref s);

if ( s != "") Ok();

[wdstest]

I am running into a very similar problem, which I logged as "How to call a ref string function?" at #18