UpdateData(true); //讀取編輯框內(nèi)容 
m_mscomm.put_Output(COleVariant(m_EditSend)); 
m_EditSend.Empty(); //發(fā)送后清空輸入框 
UpdateData(false); //更新編輯框內(nèi)容 

CByteArray HexDataBuf;
 int i = 0;
 BYTE SendBuf[128]={0};
 BYTE GetData[256]={0};
 int SendLen = 0;
 int GetLen = 0;
 
 UpdateData(TRUE);//獲取編輯框內(nèi)容
 if(m_EditSend.IsEmpty())
 {
  AfxMessageBox(_T("發(fā)送數(shù)據(jù)為空!"));
  return;
 }
 HexDataBuf.RemoveAll();    //清空數(shù)組 
 
 GetLen = m_EditSend.GetLength();
 for(i=0; i<GetLen; i++)
 {
  GetData[i] = (BYTE)m_EditSend.GetBuffer()[i];
 }
 StringtoHex(GetData, GetLen, SendBuf, &SendLen);//將字符串轉(zhuǎn)化為字節(jié)數(shù)據(jù)
 
 HexDataBuf.SetSize(SendLen);   //設(shè)置數(shù)組大小為幀長(zhǎng)度 
 for(i=0; i<SendLen; i++)
 {
  HexDataBuf.SetAt(i,SendBuf[i]);
 }
 m_mscomm.put_Output(COleVariant(HexDataBuf)); //發(fā)送十六進(jìn)制數(shù)據(jù)
 
 UpdateData(false); //更新編輯框內(nèi)容

void StringtoHex(BYTE *GB, int glen, BYTE* SB, int* slen)
{
 int i; //遍歷輸入的字符串
 int a = 0; 
 char temp; //接收字符，用來(lái)判斷是否為空格，若是則跳過(guò)
 char temp1,temp2; //接收一個(gè)字節(jié)的兩個(gè)字符 例如EB，則temp1='E',temp2 = 'B'
 *slen = 0; //輸出的16進(jìn)制字符串長(zhǎng)度
 for(i=0;i<glen;i++)
 {
 temp = GB[i];
 if(temp==' ')
 continue;
 
 if(a == 0)
  temp1 = GB[i];
 if(a == 1)
  temp2 = GB[i];
 a++;
 
 if(a==2)
 {
  a = 0;
  temp1 = temp1 - '0';
  if (temp1>10)
  temp1 = temp1 -7;
  temp2 = temp2 - '0';
  if (temp2>10)
  temp2 = temp2 -7;
 
 SB[*slen] = temp1*16+temp2;
  (*slen)++;
 }
 }
 
 }