Urgent - Passing byte array byte[] by variant examples

Urgent help needed.

Does anyone have any JAWIN examples for marshalling a byte array by variant
using JAWIN?

This was my attempt that fails.

      byte[] value = new byte[256];
      value[0] = 0;
      value[0] = 1;

      Variant vValue = new Variant();
      vValue.pbVal = value;
      vValue.vt = VarTypes.VT_UI1 | VarTypes.VT_BYREF;

Thanks Al Harper