음. 늦은 시간까지 답변 해주신거 정말 감사드립니다.. 해결했습니다.. ^^*

  AnsiString Temp = Q_Name->SQL->Text;
  AnsiString Index = Q_Name->FieldByName("Save")->AsString;
  AnsiString Str;

  AnsiString Temp1 = DateTimePicker_Date->Date;
  AnsiString Temp2 = DateTimePicker_Time->Time;
  int TimeLen = Temp2.Length();

  Str = "UPDATE Scheduler Set BCDate = '"
                       + Temp1.SubString(1,10)
                       + "' ,BCTime = '"
                       + Temp2.SubString(TimeLen-12,13)
                       + "' WHERE Save = '"
                       + Index
                       + "'" ;


이런식으로 해결을 했습니다..