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Glad you've solved this problem! :thumb:;)

Additional info: https://developercommunity.visualstudio.com/t/intellisense-broken-10000-shows-errors-but-compile/341025

They show you the places (the lines) where intellisense has found the errors.
Note that sometimes it sucks! ;)
You can switch to show only the build errors though.

It's now a very good reason to learn how to debug yor code, debug it and found out what goes wrong and why.

I guess you have to implement it yourself. Just see the examples and documentation and repeat output for each attribute you want to.

2kaud is correct.
For permissions see:
https://docs.microsoft.com/en-us/dotnet/api/system.security.permissions.fileiopermission?view=dotnet-plat-ext-6.0...

See https://docs.microsoft.com/en-us/dotnet/api/system.io.fileattributes?view=net-6.0#examples

See https://docs.microsoft.com/en-us/cpp/mfc/reference/cdatetimectrl-class?view=msvc-170#gettime

// assuming your m_Date is of the type CDateTimeCtrl
COleDateTime selectedDateTime;
if...

How to automate Excel from C++ without using MFC or #import
How to automate Excel from MFC and Visual C++ 2005 or Visual C++ .NET to fill or obtain data in a range using arrays


Doesn't this...

Are you using an excel automaton in your VC++ code?

Why not using one list control instead of four list boxes?

Congrats again! :thumb:5

https://www.google.com/search?q=TS2304&client=ms-android-samsung-ga-rev1&sxsrf=ALiCzsY3M-dnFBUYK3aiDivBp2DJfVrl5A%3A1651318808193&ei=GCBtYsvBC872gQb826Vo&oq=TS2304&gs_lcp=ChNtb2JpbGUtZ3dzLXdpei1zZXJwE...

I agree with Igor. The "classic" list control slows down with so many rows.
Consider using the virtual list control.

Press the Retry button on the Assertion dialog to step in the code causing the failure and understand what was the reason...

According to the documentation this error means:
Did you check whether the HANDLE hCon is correct/valid?

It seems to me you can't.
However the could be some (not simple) workarounds:...

Why do you throw the runtime_error when bytes_read > 0?

//Read and write operation
while(ifs){//infinite loop
bytes_read=getFileContent(fname, vec_str);
if(bytes_read>0)...

Did you read the sections:
Pausing a Thread and Thread Shutdown
Shutting down a thread from a view or main frame
Thread Shutdown Without Polling (20-Jan-01)

What does not "fit your case in...

I added CODE tags around your code snippet to make the code readable.

Now we're waiting for your explanation about what you need, what you could not achieve, and so on...

Don't reinvent the wheel! just check out a great Joe Newcomer's essay about Using Worker Threads

Debug your code to see/understand what happens inside your getFileContent() function!

So have you already posted a PM (Private Message) to jamespayne?

Your problem has nothing to do with the RichTextBox.
It is just simple mathematics. Try to solve it with a peace of paper and a pencil.
Then learn the basics how to work with integer numbers...

Do the same like with any other assertion messagebox: press a Retry button to step in the code (line) caused this assertion.
Or just find in your installation folder looking like:

this...