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code point U+00D8 in UTF-8 Did you mean Unicode? The U in "UTF-8" already implies Unicode, that's why I didn't include the name/specification "Unicode" on its own, as it would have been repetitive. UTF-8 is not a character set. I neither wrote so - I just combined the Unicode table along with the ...

I think this is (most likely) only meant for reading files, as in having a file be opened in UTF-8 by default (or when no other encoding can be detected), but then the human reader somehow finds out it's actually Windows-1252 or else and just wants to re-load (or re-interpret) the file with a ...

Unicode code point U+00D8 encoded in UTF-8 as 0xC3 0x98 How would that look if Windows-1252 is used? Then you can't use "Unicode" anymore. Or would you? My suggestion was on purpose, because now it could look this way: code point D8 in Windows-1252 encoded as byte "0xD8" IBM 850 would then be: code ...

From my experience as both user and programmer I know how ambiguous requests can be both made and understood - both sides think they hit the nail and don't think of what it could also mean/can also be meant (by simply lacking to know which other things exist, too). That's why I listed every possible ...

Oh, you confirmed that TextPad does use/used a mutex already . I interpreted your post as being exclusive, like "the DDE is like a mutex", instead of being an addition that already exists in the background in case DDE fails to work as expected. I now understood it this way (and am glad it's already ...

No, Notepad doesn't use Mutexes and/or doesn't forward file opening requests to the already running instance to then close its second instance right away. Did Windows 11 really change this?

While this may work best when f.e. I select multiple files in the Explorer to then shell select "Open" or "Open with..." for decades the way to make your program single instance only was: to simply create a Mutex at the start and then check if it already existed: in that case just make inter-process ...

And vice-versa please, so that when TextPad opened a file in binary view just because its filename extension was .jpg, although its content was still ASCII text. However, for me a simple toggle button is enough.

the hex value of the character ... a UTF-8 encoded text Those are 2 (if not 3) different things: The " hex value " of a character is subject to the encoding - in case of UTF-8 a character can be encoded in 1 or 2 or 3 or 4 bytes, resulting in such hex values. Different text encodings have different ...

The dialog windows "Customize" (for the toolbars and shortcuts) and "Document properties" could benefit from being resiable, too.

Textpad still doesn't open WITH a text file when you double-click on it Please keep in mind that the Windows version can be the culprit. In my short experience with Windows 11 no program was able to set file associations (not even when run with administrator privileges) - I had to choose the ...

I guess you miss the captions for 2 tabs, while only the caption for 1 is displayed. In that case: does it also happen using English as language? Mayby Deutsch misses a few translations...

File Explorer sends DDE messages with the file name to TextPad when you double click a file Isn't this a configuration in the Registry, where one could easily delete ...\shell\open\ddeexec\ ? For TextPad 8.4.0 on Win7x64 I don't see this with my associated file extensions, and through the decades I ...

This all worked fine for years using TextPad 7, but reverting back to TP 7 temporarily didn't help. Don't underestimate that you constantly got Windows updates - one tiny bit in that could be responsible for the "new" behavior - that would also explain why switching the TextPad version alone does ...

Oh yes - I totally forgot that. Corrected my post.

Your "\s" however could match more than only a space - the literal space would fit more IMO because then it wouldn't match unexpected "spaces" (like linebreaks or non-ASCII spaces). Or this is actually wanted...