枚举串口

来源：互联网发布：js 取消input选中编辑：程序博客网时间：2024/05/01 05:27

void GetAllComPorts(CString *pPortList)
{
//int k=0;
long   lReg;
HKEY   hKey;
DWORD   MaxValueLength;
DWORD   dwValueNumber;

lReg=RegOpenKeyExA(HKEY_LOCAL_MACHINE,
  "HARDWARE//DEVICEMAP//SERIALCOMM",
  0,
  KEY_QUERY_VALUE,
  &hKey);

if(lReg!=ERROR_SUCCESS) //成功时返回ERROR_SUCCESS，
{
  AfxMessageBox(L"Open   Registry   Error!/n");

  exit(0);
}

lReg=RegQueryInfoKeyA(hKey,
   NULL,
   NULL,
   NULL,
   NULL,
   NULL,
   NULL,
   &dwValueNumber, //返回和hKey关联的值
   &MaxValueLength,
   NULL,
   NULL,
   NULL);
if(lReg!=ERROR_SUCCESS) //没有成功
{
  AfxMessageBox(L"Getting   Info   Error!/n");

  exit(0);
}

LPSTR   pValueName,pCOMNumber;
DWORD   cchValueName,dwValueSize=6;

//printf("Number of SubKeys:%d/n",dwValueNumber);

for(int   i=0;i < dwValueNumber;i++)
{
  cchValueName=MaxValueLength+1;
  dwValueSize=6;
  pValueName=(LPSTR)VirtualAlloc(NULL,cchValueName,MEM_COMMIT,PAGE_READWRITE);
  lReg=RegEnumValueA(hKey,
  i,
  pValueName,
  &cchValueName,
  NULL,
  NULL,
  NULL,
  NULL);

  if((lReg!=ERROR_SUCCESS)&&(lReg!=ERROR_NO_MORE_ITEMS))
  {
   AfxMessageBox(L"Enum   Registry   Error or No More Items!/n");
   //printf("lreg:=%d/n",lReg);
   CString slReg;
   slReg.Format(L"%d",lReg);
   AfxMessageBox(slReg);
   exit(0);
  }

  pCOMNumber=(LPSTR)VirtualAlloc(NULL,6,MEM_COMMIT,PAGE_READWRITE);
  lReg=RegQueryValueExA(hKey,
  pValueName,
  NULL,
  NULL,
  (LPBYTE)pCOMNumber,
  &dwValueSize);

  if(lReg!=ERROR_SUCCESS)
  {
   AfxMessageBox(L"Can not get the name of the port");
   exit(0);
  }

  CString str2(pCOMNumber);//,str3;//str1(pPortList),
  *pPortList += L"," + str2;
  //strcat(pPortList,pCOMNumber);

//k+=strlen(pCOMNumber);
//k++;

VirtualFree(pValueName,0,MEM_RELEASE);
VirtualFree(pCOMNumber,0,MEM_RELEASE);
}

}