VC枚举串口端口应用

CString   strSerialList[256];  // 临时定义 256 个字符串组，因为系统最多也就 256 个
HKEY hKey;
LPCTSTR data_Set="HARDWARE//DEVICEMAP//SERIALCOMM//";
long ret0 = (::RegOpenKeyEx(HKEY_LOCAL_MACHINE, data_Set, 0, KEY_READ, &hKey));
if(ret0 != ERROR_SUCCESS)
{
return -1;
}
int i = 0;
CHAR Name[25];
UCHAR szPortName[25];
LONG Status;
DWORD dwIndex = 0;
DWORD dwName;
DWORD dwSizeofPortName;
DWORD Type;
dwName = sizeof(Name);
dwSizeofPortName = sizeof(szPortName);
do
{
Status = RegEnumValue(hKey, dwIndex++, Name, &dwName, NULL, &Type,
      szPortName, &dwSizeofPortName);
if((Status == ERROR_SUCCESS)||(Status == ERROR_MORE_DATA))
{
strSerialList[i] = CString(szPortName);       // 串口字符串保存
i++;// 串口计数
   }
} while((Status == ERROR_SUCCESS)||(Status == ERROR_MORE_DATA));
RegCloseKey(hKey);

int m_nSerialPortNum(0);// 串口计数
CString strSerialList[256];  // 临时定义 256 个字符串组
LPBYTE pBite  = NULL;
DWORD pcbNeeded = 0;  // bytes received or required
DWORD pcReturned = 0;  // number of ports received
m_nSerialPortNum = 0;
// 获取端口信息，能得到端口信息的大小 pcbNeeded
EnumPorts(NULL, 2, pBite, 0, &pcbNeeded, &pcReturned);
pBite = new BYTE[pcbNeeded];
// 枚举端口，能得到端口的具体信息 pBite 以及端口的的个数 pcReturned
EnumPorts(NULL, 2, pBite, pcbNeeded, &pcbNeeded, &pcReturned);
PORT_INFO_2 *pPort;
pPort = (PORT_INFO_2*)pBite;
for ( i = 0; i < pcReturned; i++)
{
      CString str = pPort[i].pPortName;
      // 串口信息的具体确定
      if (str.Left(3) == "COM")
      {                 
      strSerialList[m_nSerialPortNum] = str.Left(strlen(str) - 1);
      //CString temp = str.Right(strlen(str) - 3);// 下面两行注释获取串口序号用
      //m_nSerialPortNo[m_nSerialPortNum] = atoi(temp.Left(strlen(temp) - 1));
      m_nSerialPortNum++;               
      }
}

int m_nSerialPortNum(0);// 串口数
CString          strSerialList[256];  // 临时定义 30 个字符串组
int nCom = 0;
int count = 0;
HANDLE hCom;
do {
      nCom++;
      strCom.Format("COM%d", nCom);
      hCom = CreateFile(strCom, 0, 0, 0,
      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
      if(INVALID_HANDLE_VALUE == hCom )
      break;
      strSerialList[m_nSerialPortNum] = strCom;
      m_nSerialPortNum++;        
      CloseHandle(hCom);
} while(1);

int m_nSerialPortNum(0);// 串口计数
CString          strSerialList[256];  // 临时定义 256 个字符串组
CArray<SSerInfo,SSerInfo&> asi;
EnumSerialPorts(asi,TRUE);// 参数为 TRUE 时枚举当前可以打开的串口，
// 否则枚举所有串口
m_nSerialPortNum = asi.GetSize();
for (int i=0; i<asi.GetSize(); i++)
{
      CString str = asi[i].strFrien dlyName;
}