MFC 读ini文件

CString cStrNum;
int iCount;


//iCount =::GetPrivateProfileInt("开关量","总路数",10,"d:\\DIGIT.ini");
iCount =::GetPrivateProfileInt("开关量","总路数",10,sFileName.GetBuffer());//第一个参数为section名，第二个参数为key值，返回value值
for(int i = 0; i < iCount; i++)
{
CString cStrKey;
int iEnd = 0;

cStrKey.Format("%d",i + 1);
::GetPrivateProfileString("开关量",cStrKey,"defualt",cStrNum.GetBuffer(MAX_PATH),MAX_PATH,sFileName.GetBuffer());
iEnd = cStrNum.Find(",");

cStrNum.ReleaseBuffer();//调用ReleaseBuffer可刷新字符串长度。若去掉此句，下一句将出错，因为CString::Left会调用CString::GetLength，不刷新时，GetLength得到的长度有时候是错误的，为什么会错呢：http://hi.baidu.com/sonmeika/item/ccf5ed0946af5f30a3332a14

cStrNum = cStrNum.Left(iEnd);

}