Loop 1000
    Text := Text a_index "-я строка`n"
    Gui, Add, Edit, x6 y9 w241 h190 hwndhwnd_Edit1, % Text
    Gui, Show, w254, , Прокрутка текста
    EM_LINEINDEX := 0xBB
    EM_SETSEL := 0xB1
    EM_SCROLLCARET := 0xB7  
    ControlFocus,, ahk_id %hwnd_Edit1%
    ControlGet, Line_Count, LineCount,,, ahk_id %hwnd_Edit1%
    Number := Line_Count
    SendMessage, EM_LINEINDEX, Number - 1,,,ahk_id %hwnd_Edit1%
    SendMessage, EM_SETSEL, Errorlevel, Errorlevel,, ahk_id %hwnd_Edit1%
    SendMessage, EM_SCROLLCARET,,,, ahk_id %hwnd_Edit1%
return

Number := Line_Count