c/c++ get handle control of an unnamed listbox -

i using code handle of listbox need problem have 5 listboxes same class name , no title

and stops enumeration since finds first listbox

bool callback enumchildproc(hwnd hwnd, lparam lparam) {     hwlist = findwindowex(hwnd,0,"wtl_listview", "");     if(!hwlist)         return true;         return false; }  int main(void) {     hwnd a=findwindow("dialog", "");     enumchildwindows(a, &enumchildproc, (lparam)""); }