델파이소소를 빌더로 변환해서 구현중인데 다음과 같이 에러가 나네요...

고수님들 에러좀 잡아주십쇼

* 코드
void __fastcall TForm1::sButton2Click(TObject *Sender)
{
    TIEJpegAcquireStream *stream;
    String fileext;

    stream = new TIEJpegAcquireStream; <---에러 발생부분
    //FAborting = false;
    IEGetFromURL("http://admin:admin@192.168.0.120/channel2", stream, "", "","", NULL, NULL, false, fileext);
    delete stream;
}

* 에러메세지
[BCC32 Error] Unit1.cpp(7656): E2352 Cannot create instance of abstract class 'TIEJpegAcquireStream'
  Full parser context
    Unit1.cpp(7652): parsing: void _fastcall TForm1::sButton2Click(TObject *)

[BCC32 Error] Unit1.cpp(7656): E2353 Class 'TIEJpegAcquireStream' is abstract because of '_fastcall TStream::Read(void *,int) = 0'
  Full parser context
    Unit1.cpp(7652): parsing: void _fastcall TForm1::sButton2Click(TObject *)