c++ - CRichEditCtrl won't let edits put it above 160560 bytes?

Question

At about 1600 lines, about 100 chars per line, typing more neither shows up in the buffer nor calls the

ON_CONTROL( EN_CHANGE, IDC_PATCH, OnUpdate    )

callback.

If I paste into the buffer, only enough characters to come up to this limit are being pasted. For instance if there is room for 10 characters, and you paste a 30-character phrase, only 10 characters are actually inserted.

Both cases occur whether the added characters are at the end or not.

This happens to be a 64-bit Visual Studio C++ 2017 app running on Windows 10 Pro.

Answer 1

创建后，prich->GetLimitText()给出 32767，这显然是原始版本可以容纳的最大文本量。然而，它让我投入了更多——接近 160k——并继续编辑到 160k 的限制。

互联网上的一些文章暗示它具有或具有内部硬编码的“最大最大值”0xffffff，但我发现我可以在其中添加另一个 f 并GetLimitText()报告更高的值。不清楚该更高的值是否具有实际效力，或者我的设定值是否正在返回但不一定受到关注或支持。

我的解决方案是调用prich->LimitText( 0xfffffff )，这比我的用户需要的更多。