Learn the tools available to you, so you can do things on your own, rather than keep asking others reiteratively. It’s behooves us to keep as much information contained in an already asked question so that the search won’t have you looking in several different places, because then people get tired of searching multiple threads to get the same questions answered. Understand?

everyone who would see your post here will also be able to see it there.

How do you know that? Are people reading this page redirected automatically to the other page , or what am I missing? I thought people Choose to read a page based on it title, so the sets of readers might not (fully) overlap.

But if the line number solution (which I suggested 15 minutes before you posted this)

I guess my notifications on this site were turned off.

But thanks for trying to help, anyway.

You already asked that over here – no reason to ask twice in the same Community: everyone who would see your post here will also be able to see it there. It helps no one – not even you – to post the same question in two different topics; and it annoys those of us who are most likely to help you.

But if the line number solution (which I suggested 15 minutes before you posted this) will not work for you, the scripting solution explored in this discussion will. If you are willing to install the PythonScript plugin, it can be made to parse the Notepad++ command line, and it could launch the search for you – even though I think forcing Notepad++ to search the file when your chrome extension should already know the exact line (-n) or character (-p) where the text starts and could pass that to notepad++'s indicated command-line arguments – so if you cannot get -n or -p to work for you, make use of the -pluginMessage option, and write a script to read that message from the PythonScript plugin, and have PS launch the search for you.

Not sure if links are allowed here

Yes, they are - as long as the links point to valuable content connected with the topic of the issue. You can even use the Markdown syntax for embedding links into floating text.

This is a [link to Npp's homepage](https://notepad-plus-plus.org/).

becomes

This is a link to Npp’s homepage.

Nice to hear that you were successful to configure grepWin in a way that it integrates with Notepad++.

Indeed, I was too “enthusiastic” about grepWin in my statement above ;-). Sadly it provides no means to navigate to the column of a search result.

Not sure if links are allowed here, but it should be pretty easy to find. There are a million different examples on the web for how to do something like this, but I think your task would be incredibly easy.

I took a deeper look into this, and I didn’t see how to configure these two things as described.

@dinkumoil

Never mind; I see it now.
It could have been I was using an older version at first where this wasn’t supported. (Or I just missed it)
On the latest (2.0.4) now and this configuration is available by pressing the Settings button on the grepWin UI.
Nothing about it in the Help stuff that I saw, though.

It can only be configured to jump to the line of the match; having a column jump would make this truly useful.

(grepWin) can be configured to start Notepad++ or any other text editor by double-clicking its search results. It is even possible to place the cursor in Notepad++ at a certain search result using the appropriate Npp command line options.

I took a deeper look into this, and I didn’t see how to configure these two things as described. Can you elaborate, @dinkumoil ? Note that the double-clicking might be straightforward using a file association, but I don’t like those and would hope that there is another way.

I do realize that this isn’t a grepWin support forum, but we are talking about “integration” with Notepad++, so I think it is OK.

I would like to recommend using the tool grepWin for searching

A nice thing about this is that grepWin uses the Boost regex engine, just like Notepad++, so if you are very familiar with doing “advanced” searching with regular expressions in Notepad++, you’d feel very familiar with doing it in grepWin.

One more note about your code.
I notice that you do not set up ALL of the controls on the Find window before running your search.
It could be dangerous (i.e. wrong results) in certain circumstances, e.g. Match case checkbox is set one way but logically the user of your code thinks it is set the other way.
So you may want to add more code to specify the settings on other parameters that may affect your search.
Just an FYI.

The whole approach to remotely control Notepad++ via a VB or C# program seems to take too much effort and is not very reliable. Thus, I would like to recommend using the tool grepWin for searching (download it from >> here <<). It provides subfolder recursion, regular expression search (and replace), folder exclusion by pattern and filtering by file type, size and time stamp.

This tool integrates itself into the Windows Explorer files and folders context menu, can also be started via command line/batch script (providing a lot of command line options) and can be configured to start Notepad++ or any other text editor by double-clicking its search results. It is even possible to place the cursor in Notepad++ at a certain search result using the appropriate Npp command line options.

I will try WaitWindow funciton.

I don’t think they exist in the raw win32 api. I think they are just wrappers in that specific Perl library. But if you can find them for your library, great.

I use a loop to wait the Notepad++ handle. But I don’t think this is a good solution

Waiting for a handle is not bad practice. In the Perl Win32::GuiTest library previously mentioned, two of the commonly-used wrapper functions are WaitWindow and WaitWindowLike, which wrap around the FindWindow interface, like you’ve done. That’s really the best way to make sure the Window exists after you’ve created it.

Unfortunately, there isn’t a similar “it exists, but is it ready for me?” call. Sometimes, I’ve found that trying to edit the text or launch menus immediately after the window exists will intermittently fail; in those cases, I add a 100ms or 1s delay (normally, what I’m automating in Notepad++ isn’t time critical; one second difference doesn’t matter).

So I think wait-for-hwnd is a good first step; if that’s not sufficient, wait a bit after you have the handle before trying to do something with it.

Dim hNppWnd As IntPtr = IntPtr.Zero
While CInt(hNppWnd) = 0
    hNppWnd = FindWindow("Notepad++", fileFullPath & " - Notepad++")  'Notepad++ handle
    i += 1
    If i > 10 ^ 5 Then
        MsgBox("Timeout!" & Environment.NewLine & "Please run this command again.", MsgBoxStyle.Exclamation, "Warning")
        Exit While
    End If
End While

When I use ShellExexute to open a file by Notepad++, I don’t know when it’s ready, I mean I can get the handle of Notepad++. So I use a loop to wait, once the handle value of Notepad++ is greater than 0, then I think Notepad++ it’s ready, then I can start search.

It appears from your code that you found a solution to this?

I did it, thanks a lot for your help!!!

Well, that’s good.
It is sort of tradition to provide more details in the form of code about your working solution, for those that read this later wanting to do the same or a similar thing.
Not mandatory, though.