One Edit Box Likes \n, Other Requires \r\n

Question

One Edit Box Likes \n, Other Requires \r\n

a_unique_name 401

Hello Folks:

Developing on VS 2022 Community, C++.

Two modules I've developed to help debug my apps have multi line text controls where I display whatever text I think might help as I develop the app.

One edit control inserts a line feed when I send it a "\n" and the other ignores the line feed unless it comes in as a "\r\n".

It's kind of annoying that carefully formatted text displayed in one control looses its formatting when displayed in the other. I have code that will replace "\n" with "\r\n" but I'd rather figure out a way to avoid needing such a function.

The dialogs and edit controls were both defined in the Dialog Editor and the edit control properties for both look identical to me.

Neither edit control received a EM_SETENDOFLINE message but I've recently tested that feature to no effect. An EM_GETENDOFLINE message always seems to return 0, regardless of what I set the control's end of line to.

Any idea what I'm missing?

Thanks
Larry

Viorel 122.9K Reputation points

2022-11-16T20:20:32.65+00:00

Maybe one of controls is Rich Edit. Use it instead of simple textbox. It seems to support "\n", "\r" and "\r\n".
a_unique_name 401 Reputation points

2022-11-16T22:00:35.017+00:00

Thanks Viorel:

Maybe one of controls is Rich Edit. Use it instead of simple textbox. It seems to support "\n", "\r" and "\r\n".

Sorry, I'm an idiot.

I found a call to my lf to crlf convert function buried in my code that displays text to the edit box that presents properly formatted information.
Igor Tandetnik 1,116 Reputation points

2022-11-17T02:29:18.92+00:00

See also: https://learn.microsoft.com/en-us/windows/win32/controls/edit-control-window-extended-styles
RLWA32 49,666 Reputation points

2022-11-17T12:51:03.74+00:00

If you are not using V6 of the Common Controls then EM_SETENDOFLINE will fail (check the return code). EM_GETENDOFLINE will always return EC_ENDOFLINE_DETECTFROMCONTENT (0).

I'll guess that you have not provided the necessary manifest for the V6 controls.

Accepted answer

0 additional answers

Your answer

Viorel 122.9K Reputation points

2022-11-16T20:20:32.65+00:00

Maybe one of controls is Rich Edit. Use it instead of simple textbox. It seems to support "\n", "\r" and "\r\n".
a_unique_name 401 Reputation points

2022-11-16T22:00:35.017+00:00

Thanks Viorel:

Maybe one of controls is Rich Edit. Use it instead of simple textbox. It seems to support "\n", "\r" and "\r\n".

Sorry, I'm an idiot.

I found a call to my lf to crlf convert function buried in my code that displays text to the edit box that presents properly formatted information.
Igor Tandetnik 1,116 Reputation points

2022-11-17T02:29:18.92+00:00

See also: https://learn.microsoft.com/en-us/windows/win32/controls/edit-control-window-extended-styles
RLWA32 49,666 Reputation points

2022-11-17T12:51:03.74+00:00

If you are not using V6 of the Common Controls then EM_SETENDOFLINE will fail (check the return code). EM_GETENDOFLINE will always return EC_ENDOFLINE_DETECTFROMCONTENT (0).

I'll guess that you have not provided the necessary manifest for the V6 controls.

Answer 1

Michael Taylor 60,346

The built in Win32 edit control requires \r\n (Windows) for newline characters. It doesn't support the \n (Unix) variant. Also ensure that the control itself has multiline enabled otherwise they will both be ignored. When inserting text into the control that may have Unix newlines you have to convert them to Windows newlines.

a_unique_name 401 Reputation points

2022-11-16T22:04:22.317+00:00

Thanks cooldadtx:

The built in Win32 edit control requires \r\n (Windows) for newline characters.

Sorry, I'm an idiot.

I found a call to my lf to crlf convert function buried in my code that displays text to the edit box that presents properly formatted information.

Share via

One Edit Box Likes \n, Other Requires \r\n

0 additional answers

Your answer