我可以从DISPPARAMS获取正确的IDispatch吗?

然后将指针投射到

例如,在javascript中,我想做这样的事情:

var x = external.obj.x;
var y = external.obj.y;
external.obj.x = y;

和 .

STDMETHODIMP CMyDispatch::Invoke(DISPID dispIdMember, REFIID, LCID, WORD wFlags,
                                 DISPPARAMS* pDispParams, VARIANT* pVarResult,
                                 EXCEPINFO*, UINT*) {
  if( pVarResult )
  {
    CMyDispatch* pDisp = new CMyDispatch();
    CComVariant val( pDisp );
    val.Detach( pVarResult );
  }
  return S_OK;
}

在 CMyDispatch。调用() 和

STDMETHODIMP CMyDispatch::Invoke(DISPID dispIdMember, REFIID, LCID, WORD wFlags,
                                 DISPPARAMS* pDispParams, VARIANT* pVarResult,
                                 EXCEPINFO*, UINT*) {
  ASSERT( pDispParams->cArgs == 1 );
  ASSERT( VT_DISPATCH == pDispParams->rgvarg[0].vt );
  IDispatch* pDisp = ( pDispParams->rgvarg[0].pdispVal ); // <-- garbage
  CMyDispatch* pDispatch = (CMyDispatch*) pDisp; // <-- garbage
  return S_OK;
}

指针?