http://finetech.myweb.hinet.net/TecDoc/Doc2/AcceRS232.htm 參考上面的文章後 小弟寫了一個程式!(程度不高) 是想在按了一個鈕後從rs232讀取一個資料 void CAutentoDlg::OnButton2() { HANDLE handle; DCB dcb; COMMTIMEOUTS TimeOut; TimeOut.ReadIntervalTimeout = 0; TimeOut.ReadTotalTimeoutMultiplier = 0; TimeOut.ReadTotalTimeoutConstant = 500; //(總讀取 time out 時間 = 0.5 秒) TimeOut.WriteTotalTimeoutMultiplier = 0; TimeOut.WriteTotalTimeoutConstant = 500; //(總寫入 time out 時間 = 0.5 秒) BuildCommDCB("9600,n,8,1",&dcb); handle=CreateFile("Com2", GENERIC_READ, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); SetCommState(handle,&dcb); SetupComm(handle,1024,1024); SetCommTimeouts(handle,&TimeOut); char lpBuf; DWORD dwRead; ReadFile(handle, &lpBuf, 1, &dwRead, NULL); if (dwRead == 0) { } else {CString str; str=lpBuf; CListBox *lbx ; lbx = (CListBox*)GetDlgItem(IDC_LIST1); lbx ->AddString(str); } } 編譯後沒問題!!可是執行後我按下我指定的鈕後跳出視窗說有問題 裡面的我看不懂!! AUTENTO caused an invalid page fault in module KERNEL32.DLL at 0197:bffa7c6a. Registers: EAX=0064f520 CS=0197 EIP=bffa7c6a EFLGS=00010246 EBX=0064f92c SS=019f ESP=0064f4c0 EBP=0064f538 ECX=0064f5dc DS=019f ESI=0064f520 FS=4e47 EDX=00000000 ES=019f EDI=004152b5 GS=0000 Bytes at CS:EIP: c6 47 ff 00 ff 36 e8 73 83 fd ff 85 c0 74 3a 89 Stack dump: 0064f5dc 00000000 0064f970 bffa71ba 0064f520 0064f600 0064f56c 0064f970 0064f4fc 5f42c8cb 0064f5ac 00000000 00000000 0064f800 00000000 5f491875 請幫幫我 抓Beg謝謝!!

找到一個錯誤    

handle=CreateFile("Com1",
                  GENERIC_READ
                  0,
                  0,
                  //CREATE_ALWAYS,
                  OPEN_EXISTING,   //要開com port須設定此參數
                  FILE_ATTRIBUTE_NORMAL,
                  0);