如何用VC把计算机中一共有几个串口检测出来？

Question

如何用VC把计算机中一共有几个串口检测出来？

Answer 1

http://www.codeguru.com/Cpp/W-P/system/hardwareinformation/article.php/c5721

Answer 2

HKEY hKey;
LONG ret;
OSVERSIONINFO  osvi;
BOOL bOsVersionInfoEx;
char keyinfo[100],comm_name[200],ValueName[200], Uart[16];
int i;
DWORD sType,Reserved,cbData,cbValueName; ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

memset(keyinfo,0,100);
strcpy(keyinfo,"HARDWARE\\DEVICEMAP\\SERIALCOMM");
    i=0; sType=REG_SZ;Reserved=0;
bOsVersionInfoEx =GetVersionEx(&osvi);
    ret=RegOpenKeyEx(HKEY_LOCAL_MACHINE,keyinfo,0,KEY_ALL_ACCESS,&hKey);
if (ret==ERROR_SUCCESS){
   if (osvi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) 
   {
   for(i=1;i<=128;i++)
   {    
      sprintf(comm_name,"COM%d",i);
  m_Uart.AddString(comm_name);
   }
   }
       else if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT)
   {
    do 
  {
    cbData=200;cbValueName=200;
    memset(comm_name,0,200); 
    memset(ValueName,0,200);
    ret=RegEnumValue(hKey,i,ValueName,&cbValueName,NULL,&sType,(LPBYTE)comm_name,&cbData);
if (strlen(comm_name) > 0)
{
// 检测出来的串口
}
    i++;
  }while (ret==ERROR_SUCCESS);
   }
}

RegCloseKey(hKey);

Answer 3

从com1一直到Comn一个一个的打开，我以前好像这么干过，呵呵