枚举计算机的串口函数

这个函数是读注册表的

void FindCommPort(CComboBox   *pComboBox )
{
HKEY   hKey;
#ifdef   _DEBUG
ASSERT(   pComboBox   !=   NULL   );
pComboBox->AssertValid();
#endif
if(::RegOpenKeyEx(   HKEY_LOCAL_MACHINE,
"Hardware\\DeviceMap\\SerialComm",
NULL,
KEY_READ,
&hKey )   ==   ERROR_SUCCESS )   //打开串口注册表对应的键值
{
int   i=0;
char   portName[256],commName[256];
DWORD   dwLong,dwSize;

while(1)
{
dwLong   =   dwSize   =   sizeof(portName);
if(   ::RegEnumValue(   hKey,
i,
portName,
&dwLong,
NULL,
NULL,
(PUCHAR)commName,
&dwSize   )   ==   ERROR_NO_MORE_ITEMS )//   枚举串口
break;

pComboBox->AddString(   commName   );   // commName就是串口名字
i++;
}

if(   pComboBox->GetCount()   ==   0   )
{
::AfxMessageBox("在HKEY_LOCAL_MACHINE:Hardware\\DeviceMap\\SerialComm里找不到串口!!!");
}

RegCloseKey(hKey);
}
}