: //---------------------------------------------------------------------------
: WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
: {
:         try {
:                 Application->Initialize();
:                 Application->CreateForm(__classid(TSDIAppForm), &SDIAppForm);
:                 Application->CreateForm(__classid(TdlgDBConnect), &dlgDBConnect);
:                               
:                 if (dlgDBConnect->ShowModal() != mrOk) // 이런 식으로 호출하면 됩니다.
:                         // Cancel 버튼을 누르거나, DB 연결에 실패한 경우 프로그램 종료
:                         Application->Terminate();
:
:                 Application->Run();  // 메인 폼은 여기서 호출합니다.
:         } catch(Exception &exception) {
:                 Application->ShowException(&exception);
:         }
:        
:         return 0;
: }
: //---------------------------------------------------------------------
:
:
ShowModal is not a member of 'TdlgDBConnect' , becase the type is not yet defiend.

이런 메시지가 나오는데요