[문법이나 철자가 틀린게 많아서 아래와 같이 고쳤습니다]

      char *Str = "";
        //AnsiString sHex;
        //char szHex[64];
        char *sHex;
        char temp;
        Byte szHex[64];
        String str1,str2;
        int i;
//        ComLed1->State = True;
//        ComPort->ReadStr(Str,Count);
        str1="12345678";
        temp=0xff;
        str2=temp;
        str1=str1+str2+str2+str2;
        sHex=str1.c_str();
        for (int i=0; i< str1.Length(); i++)
        {
          szHex[i]=sHex[i];
        }
        for (int i=0; i< str1.Length(); i++)
        {
            str2.sprintf("%02x",szHex[i]);
             Memo1->Lines->Add(str2);
        }