C++获取可使用的COM口列表

    int iCOM;    char cCom[MAX_PATH] = " ";     bool bFirstTime = TRUE;    for(int i = 1; i<=iCOM; i++)    {        HANDLE hCom; //全局变量，串口句柄         char cTemp[MAX_PATH];         char cTempFull[MAX_PATH];         sprintf(cTemp, "COM%d", i);        sprintf(cTempFull, "\\\\.\\COM%d", i);        hCom=CreateFile(cTempFull,//COM1口             GENERIC_READ|GENERIC_WRITE, //允许读和写             0, //独占方式             NULL,             OPEN_EXISTING, //打开而不是创建             0, //同步方式             NULL);         if(hCom==(HANDLE)-1)         {             //AfxMessageBox("打开COM失败!");         }         else        {            if(bFirstTime==TRUE)            {                bFirstTime = FALSE;                sprintf(cCom,"%s",cTemp);            }            else            {                sprintf(cCom,"%s,%s",cCom,cTemp);            }        }        CloseHandle(hCom);    }