[ADVANCED-DOTNET] Trouble getting struct with Interop

[Mont Rothstein]

I am trying to get a struct from a function in a DLL, but I always get zero.

The below code always leaves the struct with 0 as the value for each
parameter in the struct though the equivalent C code populates the values.

Does anyone see what I am missing?

Thanks,
-Mont

Here is what I have:

C definitions:

typedef struct {
   uint32_t    majorErrorNo;
   uint32_t    minorErrorNo;
   uint32_t    sysErrorNo;
} FlxActError;

   void flxActCommonHandleGetError(FlxActHandle handle, FlxActError *err);


   public struct ActivationError
   {
       public uint majorError;
       public uint minorErrorNo;
       public uint systemErrorNo;
   }


C# definition and function call:

       [DllImport("mydll.dll", CharSet = CharSet.Ansi)]
       private static extern void flxActCommonHandleGetError(handle, out
ActivationError error);

       public ActivationError GetLastError()
       {
           ActivationError error;

           flxActCommonHandleGetError(Handle, out error);

           return error;
       }

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