case WM_NOTIFY:
        {
            if ((((LPNMHDR)lParam)->hwndFrom))
            {
                switch (((LPNMHDR)lParam)->code)
                {
                case NM_DBLCLK:
                {
                    //Открытие чата для общения
                    //Get index of user
                    int iPos = ListView_GetNextItem(ContactList, -1, LVNI_SELECTED);
                    if (iPos == -1) {
                        MessageBox(hDlg, "Вы не выбрали контакт!", "Ошибка", MB_OK | MB_ICONWARNING);
                        break;
                    }
                    //Set chated person nickname and id
                    chat_w = users[iPos].name;
                    chat_w_id = iPos;

                    //Check if chat is already opened
                    if (IsWindow(ChatWindow)) {
                        DestroyWindow(ChatWindow);
                    }
                    //Create chat window and than show it
                    ChatWindow = CreateDialog((HINSTANCE)GetWindowLong(hDlg, GWL_HINSTANCE), MAKEINTRESOURCE(IDD_CHAT), NULL, (DLGPROC)DlgProcChat);
                    ShowWindow(ChatWindow, SW_SHOW);
                    //Выход
                }
                break;
                }
            }
            break;
        }