TRichView.com

For specific characters, within a specified form, press backspace key, specific characters are erased and the cursor forward, to specific characters. through the right key to the menu could be deleted. for example, the phrase '[richview]', when the press backspace key deletes, '[]' not be deleted. if a direct input '[]' can be deleted.

If convenient for example, the best

thank you very much

Sorry, your request about undeletable [] cannot be implemented, or at least it is very difficult.

Can give some thoughts or advice?
thanks

Try to implement your task using a different approach.
Can you explain what do you want to implement? Not technical details, but what do your application needs to do?