Chelly

Labelmanager2_tlb::IDocument* __fastcall Open(BSTR strDocName/*[in]*/, 
                                                VARIANT_BOOL ReadOnly/*[in,def,opt]*/)
  {
    TDispID dispid(/ Open / DISPID(7));
    TAutoArgs<2> _args;
    _args[1] = strDocName /*[VT_BSTR:0]*/;
    _args[2] = ReadOnly /*[VT_BOOL:0]*/;
    OleFunction(_dispid, _args);
    return (Labelmanager2_tlb::IDocument* /*[C1]*/)(LPDISPATCH) /*[VT_DISPATCH:1]*/_args.GetRetVariant();
  }

Its looks like the  opterator=  doesnt work.

I tried step execution ,than i found 

_args[1] = strDocName /*[VT_BSTR:0]*/;

this line is entering into the bool opertartor as follow

    OleVariant& operator =(const bool rhs)
    {
      PVariant(this)->operator=(rhs);
      return *this;
    }

so ,maybe we can  as follow

Labelmanager2_tlb::IDocument* __fastcall Open(BSTR strDocName/*[in]*/, 
                                                VARIANT_BOOL ReadOnly/*[in,def,opt]*/)
  {
    TDispID dispid(/ Open / DISPID(7));
    TAutoArgs<2> _args;
    UnicodeString strChange = strDocName;
    _args[1] = strChange /*[VT_BSTR:0]*/;
    _args[2] = ReadOnly /*[VT_BOOL:0]*/;
    OleFunction(_dispid, _args);
    return (Labelmanager2_tlb::IDocument* /*[C1]*/)(LPDISPATCH) /*[VT_DISPATCH:1]*/_args.GetRetVariant();
  }