not sure why this text seems to have a Alt+h keyboard accelerator as I don’t see how you can use it in Notepad++'s UI.

One more thing I’m not sure of: Why I had said that.
If a control in the Incremental Search window has input focus, e.g. the Find edit box, then Alt+h will focus and toggle the Highlight all checkbox setting.

if buff.value == u’&Highlight all’:

Also not sure why this text seems to have a Alt+h keyboard accelerator as I don’t see how you can use it in Notepad++'s UI.

but it does not check the “Highlight all” checkbox. Any pointers?

It’s all about having that control’s handle (hwnd).

Cobbling some code together by stealing a lot from THIS THREAD, I came up with this:

# -*- coding: utf-8 -*-
from __future__ import print_function

import ctypes
from ctypes.wintypes import BOOL, HWND, LPARAM

WNDENUMPROC = ctypes.WINFUNCTYPE(BOOL, HWND, LPARAM)

FindWindow = ctypes.windll.user32.FindWindowW
SendMessage = ctypes.windll.user32.SendMessageW
EnumChildWindows = ctypes.windll.user32.EnumChildWindows
GetClassName = ctypes.windll.user32.GetClassNameW
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
create_unicode_buffer = ctypes.create_unicode_buffer

curr_class = create_unicode_buffer(256)

BM_SETCHECK = 0x00F1
BST_CHECKED = 1

incr_search_highlight_all_hwnd = [ 0 ]

def EnumCallback(hwnd, _):
    GetClassName(hwnd, curr_class, 256)
    length = GetWindowTextLength(hwnd)
    if length:
        buff = create_unicode_buffer(length + 1)
        GetWindowText(hwnd, buff, length + 1)
        print('class:', curr_class.value, '|', 'text:', buff.value)
        if buff.value == u'&Highlight all':
            incr_search_highlight_all_hwnd[0] = hwnd
    else:
        print('class:', curr_class.value)
    return True  # let enumeration continue

notepad.menuCommand(MENUCOMMAND.SEARCH_FINDINCREMENT)
notepad_hwnd = ctypes.windll.user32.FindWindowW(u'Notepad++', None)
if notepad_hwnd:
    EnumChildWindows(notepad_hwnd, WNDENUMPROC(EnumCallback), 0)
    if incr_search_highlight_all_hwnd[0]:
        SendMessage(incr_search_highlight_all_hwnd[0], BM_SETCHECK, BST_CHECKED, 0)

It’s instructive to look at the PythonScript console as it runs – although for me it seems to write to the console very slowly and I don’t know why this is…

If you’re willing to use the PythonScript plugin, I have a solution in the form of…a script!

I’m willing - but I don’t want that use case. I want to check the “Highlight all” in the Search => Incremental Search “window”.

I modified your script, but having some issues. The Incremental Search windows is “attached” to Notepad++ so I don’t see a new Windows class name (#32770 like for the “Mark” pop-up). Also, for the Window title - “Mark” works nicely for the Mark window popup - what do I use for the Incremental Search “window” which is “attached” to Notepad++ - the Notepad++ “title” I have changes based on the open filename. I think i got the other stuff done:

• replace IDC_MARKLINE_CHECK with IDC_INCFINDHILITEALL (1690, from ScintillaComponent/FindReplaceDlg_rc.h)
• MENUCOMMAND.SEARCH_MARK replaced with MENUCOMMAND.SEARCH_FINDINCREMENT

So my script does open the Incremental Search “window”, but it does not check the “Highlight all” checkbox. Any pointers?

Cheers.

If you’re willing to use the PythonScript plugin, I have a solution in the form of…a script!

I call the script BookmarkLineCheckboxTick.py and it looks like this:

# -*- coding: utf-8 -*-
from __future__ import print_function

#-------------------------------------------------------------------------------

from Npp import *
import inspect
import os
import ctypes
from ctypes import wintypes

#-------------------------------------------------------------------------------

user32 = ctypes.WinDLL('user32')

LRESULT = wintypes.LPARAM

SendMessageW = user32.SendMessageW
SendMessageW.restype = LRESULT
SendMessageW.argtypes = [ wintypes.HWND, wintypes.UINT, wintypes.WPARAM, wintypes.LPARAM ]

#-------------------------------------------------------------------------------

IDC_MARKLINE_CHECK = 1616
BM_SETCHECK = 0x00F1
BST_CHECKED = 1

#-------------------------------------------------------------------------------

class BLCT(object):

    def __init__(self):
        notepad.menuCommand(MENUCOMMAND.SEARCH_MARK)
        find_dlg_hwnd = user32.FindWindowExW(None, None, u'#32770', u'Mark')
        bookmark_checkbox_hwnd = user32.GetDlgItem(find_dlg_hwnd, IDC_MARKLINE_CHECK)
        SendMessageW(bookmark_checkbox_hwnd, BM_SETCHECK, BST_CHECKED, 0)

#-------------------------------------------------------------------------------

if __name__ == '__main__': BLCT()

It can be set to run at Notepad++ startup by setting the scripting plugin’s Initialisation parameter to ATSTARTUP and then putting the following lines into the startup (User) script:

import BookmarkLineCheckboxTick
BookmarkLineCheckboxTick.BLCT()

The result of this will be that the Bookmark line checkbox will always be ticked when Notepad++ starts.

Maybe it’s a bug.

It’s not a bug. It’s just not a feature I’ve heard of anyone asking for, and maybe not one that the developers have thought of to implement. If you would like Notepad++ to remember the “Bookmark line” checkbox like it remembers the other checkboxes, you can follow the FAQ instructions for making a feature request