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From: Kalkidas <eat@joes.pub>
Newsgroups: comp.lang.basic.visual.misc
Subject: Re: RichEdit control question
Date: Sun, 16 Oct 2011 18:21:58 -0700
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On 10/15/2011 4:16 PM, Thorsten Albers wrote:
> Kalkidas<eat@joes.pub>  schrieb im Beitrag<j7cno4$mac$1@dont-email.me>...
>> And all I wanted to know is if there's anybody who knows the RichEdit
>> control well enough to tell me what the global toggle for hidden text
>> is, assuming it exists, which it almost certainly does.
>
>>> MS Word can toggle hidden text off/on almost instantaneously, even in
>>> huge files with thousands of instances of hidden words. This indicates
>>> that it is not using a process of iteration, but is toggling some global
>>> feature.
>
>>> The feature must be part of the WinAPI RichEdit control, not the MS
>>> Office engine, since the DevExpress XtraRichEdit control also has this
>>> capability, and it doesn't require the presence of MS Office.
>
> The only thing which the Rich Edit Control and MS Word (and others like
> e.g. WordPad) have in common is that they use the Text Object Model (TOM).
> MS Word does _not_ make use of the Rich Edit Control! The Rich Edit
> Control, MS Word and presumably also the "DevExpress XtraRichEdit" are
> administrating the data with the TOM but each one of these has its own
> method to render the data to a certain device like the screen. The
> rendering is the point at which a "global toggle" for hidden text is to be
> implemented. And while MS Word implements such a "global toggle" the Rich
> Edit Control AFAIK does _not_. If you want to implement a "global toggle"
> for hidden text you have to implement your own rendering method.

Thank you for an informative reply. I'll see what I can learn about the TOM.