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);
}