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Let's say you've just set some text in a spellcheck-enabled rich edit control, and the text has some spelling errors. A split second will go by, spellcheck will kick in, and then the misspelled text will get underlined. But guess what: the rich edit control will actually send an EN_CHANGE notification just for the underlining event (this is assuming you've registered for notifications by doing SendMessage(hwnd, EM_SETEVENTMASK, 0, (LPARAM)ENM_CHANGE)).

Is there a workaround to not get this type of behavior? I've got a dialog with some spellcheck-enabled rich edit controls. And I also want to know when an edit event has taken place, so I know when to enable the "Save" button. Getting an EN_CHANGE notification merely for the spellcheck underlining event is thus a problem.

One option I've considered is disabling EN_CHANGE notifications entirely, and then triggering them on my own in a subclassed rich edit control. For example, when there's a WM_CHAR, it would send the EN_CHANGE notification explicitly, etc. But that seems like a problem, because there are many types of events that should trigger changes, like deletes, copy/pastes, etc., and I'd probably not capture all of them correctly.

Another option I've considered is enabling and disabling EN_CHANGE notifications dynamically. For example, enabling them only when there's focus, and disabling when focus is killed. But that also seems problematic, because a rich edit might already have focus when its text is set. Then the spellcheck underline would occur, and the undesirable EN_CHANGE notification would be sent.

I suppose a timer could be used, too, but I think that would be highly error-prone.

Does anybody have any other ideas?

Here's a reproducible example. Simply run it, and it'll say something changed:

I have 4 buttons that have no direct application to my program. I would like to hide or remove them. I've searched to find out what they are called...they look like navigation, left/right arrows, next/previous. I can't seem to find what they are called. I have looked on the Microsoft site and looking at the CTabView members doesn't seem to jump out and say "hey, these are what you're looking for"....

I'm hoping it is a relatively easy task. Anyone know how to just "turn them off"?

Thanks.

I was able to resolve the C4430 mentioned by moving the new function before the existing in OutputWnd.h and that solved the issue in the output pane area where the arrows are now gone. What I forgot to mention is that I have another mechanism AddView that is creating 2 runtime classes and putting those into a tabbed document view. This time, I've been using GetTabControl() to make it pretty, but this also suffers from the same issue, the scroll arrows are now present.

This is what the code looks like that creates the 2 new tabs:

So I'm using the MFC wizard created output pane and everything works as I want it. What I'm trying to figure out is how to hide/show a specific tab with the user selecting it from the menu. I have two tabs, one is status, one is debug...I have a user menu option to turn the Debug on/off and I do this by using a switch using the registry to track the state of whether to draw it on the app start. I would like to be able to just turn the tab on and off without having to restart.

Please note that I have found that I need to add COMBOBOXEXITEM values much like LVITEM based on this book: Image Lists and ComboBoxEx Controls | Programming Windows with MFC, Second Edition (flylib.com)

FYI, I am getting the above error on the SetImageList call:

My English is not perfect. I am using Visual C++ 2019 and MFC. Example program: an SDI program, the base of the view is CScrollView, draws 128*128 0s in a matrix. But MFC does not clear the background at scrolling with the scrollbar. Have you an idea? Thank you.

In settings of Windows, I am using 96 dpi * 3 = 288 dpi. I tried: 96 dpi mode is affected so.

How can I upload the example program to this?

I need some guidance on how to add a drop down list from an array of data after the read info from the MP4 Tag data is parsed. The mechanism I'm using is 100% operational, this is a creature feature addition. The MP4 tag I'm working with is Genre using the ID3V1 standard. There are 191 choices. The way my app was inherited, there are 2 columns, property/value and multiple rows. All of that works. The Genre tag was setup willy nilly so you could basically type whatever and it would store it. I want to remove that and have the 191 elements in the array to choose from using the drop down list. Part of the loading process is that it will pull in whatever was in the MP4 file. So, I want the user to be able to leave as is (most likely tagged by something that supports ID3V2), or select from the populated 191 elements in the dropdown list.

The object looks like this information.h:

So using the MFC wizard, there is a context menu in the output pane tabs that it creates for "Copy" and "Clear" & Hide. I have the clear sorted out, but what I can not seem to get my head around is how to use the code provided outside of Visual Studio from MS on how to copy data to the clipboard.

https://docs.microsoft.com/en-us/cpp/mfc/clipboard-using-the-windows-clipboard?view=msvc-160

There are two tabs in the output pane: Status/Debug. The code provided by MS is only has 1 issue and I can't sort out the problem, keeps saying unknown identifier (which I know what it means, but not sure it's saying that since it is an object in the OutputWnd.h file), but the same variable is used elsewhere in the same .cpp file.

My goal here: If I click on a single line in the "status" or "debug" tab, right click, the popup menu shows copy/clear.....I want to copy the selected line to the clipboard. The example code uses:

The MFC Wizard created a project with a CWorkSpaceBar which in my case is actually based on CBCGPDockingControlBar, the MFC equivalent is CDockablePane. The wizard also created a m_wndTree based on CBCGPTreeCtrl (CTreeCtrl). It created it in its OnCreate() like this:

I have a main window with main NSView handling its events. It works fine.

However, once I add a transparent child window, events stop being sent randomly after about 5 seconds, until I move the mouse. For example, if I scroll, it works fine for about 5 seconds, then the scrollWheel event is simply not triggered, until I move the mouse a bit.

(I need the transparent child window to display native elements on top of the Metal view).

Here's how I add the child window: