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Limitation for CRichEditCtrl

Posted on 1999-01-15
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Last Modified: 2013-11-20
Hi,

Is there a limitation for the text in CRichEditCtrl?
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Question by:stzclaus
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Tommy Hui earned 100 total points
ID: 1327734
You mean the size?

If so, you can change that with EM_LIMITTEXT to increase the number of characters in the richedit control.
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by:mmachie
ID: 1327735
from the msdn help:

If you need to use a control that is expected to contain near or over 64 KB of data, use CRichEditCtrl or CRichEditView. These classes wrap the rich edit Windows control. In both Windows 95 and Windows NT4, there is no definite limit on the amount of text that the control can hold. Theoretically, the rich edit control allows for a maximum of 4 GB of text. In practice, you can run into performance problems with even less than 1 MB of text. Files with many lines of text (not necessarily large files, because the lines can be very short) require a lot of time and CPU power to process the first time scrolling or resizing of the view window. Once the CPU has processed these actions, the control behaves normally.

The maximum text that a CRichEditCtrl can hold can be changed by calling CRichEditCtrl::LimitText(). However, this will not effect any of the problems just mentioned. One possible option for storing huge amounts of text into a RichEdit control would be to only stream in the amount of text that is needed at a time. This would not be easy, because you need to handle the scrolling logic to load in the appropriate text for the position of the scrollbar thumb for this method to work.

Another option is to design your own Cview-based class.


hth
mikem

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