GetWindowText.mq4

#property strict

#include <WinUser32.mqh>

void OnStart()
{
    int hwnd = WindowHandle(_Symbol, _Period);
    string text = "0123456789";
    GetWindowTextW(hwnd, text, StringLen(text));
    PrintFormat("hwnd=0x%x, text=%s", hwnd, text);

    GetWindowTextW(GetParent(hwnd), text, StringLen(text));
    PrintFormat("prentHwnd=0x%x, text=%s", GetParent(hwnd), text);
}