自身支持排序的ListCtrl[3]

int callback csortlist::listcompare(lparam lparam1, lparam lparam2, lparam lparamsort)
{
 csortlist* plist=(csortlist*)lparamsort;
 int nitem1, nitem2;
    
    lvfindinfo findinfo;
    findinfo.flags = lvfi_param;    // 指定查找方式
    findinfo.lparam = lparam1;
    nitem1 = plist->finditem(&findinfo, -1); // 得到对应item索引
    findinfo.lparam = lparam2;
    nitem2 = plist->finditem(&findinfo, -1);

 if((nitem1 == -1) || (nitem2 == -1))
    {
     trace("无法找到!\n");
  return 0;
    }

 cstring str1,str2;
 str1 = plist->getitemtext(nitem1, plist->m_nsortedcol); // 得到排序列的text
    str2 = plist->getitemtext(nitem2, plist->m_nsortedcol);
 int icompres = 0;
 if(str1 > str2)
  icompres = 1;
    else if(str1 == str2)
  icompres = 0;
    else
  icompres = -1;

 if(plist->m_basc)
  return icompres;
 else
  return icompres*-1;
 return 0;
}