"파일->열기"에 이렇게 코딩을 했습니다.. 근데.. child->SetParent(this);부분에서 에러가 나네요...
[C++ Error] '_fastcall TCustomForm::SetParent(TWinControl *)' is not accessible.
어떻게 하면...

        if(OpenDialog->Execute())
        {
                TChild* child = new TChild(this);
                child->SetParent(this);
                child->Image->Picture->LoadFromFile(OpenDialog->FileName);
                child->ClientWidth = child->Image->Picture->Width;
                child->ClientHeight = child->Image->Picture->Height;
                child->Caption = OpenDialog->FileName;
                child->Show();
        }