获取style里元素的值
char* styleVal="position:absolute;left:111;top:0;height:315;width:1760;";
CString strVal(styleVal);
CString Ele(_T("left:"));
int n=QueryValOfStyleEle(strVal,Ele);
int QueryValOfStyleEle(CString &src,const CString &ele)
{
int n=src.Find(ele);
CString out=src.Right(src.GetLength()-n);
n=out.Find(_T(":"));
out=out.Right(out.GetLength()-n-1);
n=out.Find(_T(";"));
out=out.Left(n);
n=_ttoi(out.GetBuffer());
return n;
}