ATL / WTL / STL

You would be hard-pressend to find any books out there, but there used to be some excellent articles here on CP, but Michael Dunn has some great ones... https://www.codeproject.com/articles/WTL-for-MFC-Programmers-Part-I-ATL-GUI-Classes

Read up on it here at CP: Artificial Intelligence[^]

catch exceptions does not overrule systems.program.

typename std::vector::iterator p = m_vItems.begin(); or auto p = m_vItems.begin();

Create some button controls as listbox's children window, put its on the foreground of the listbox, you have to process some messages to change the control's data, coordinates, etc.

My insert is in the middle of for(;;) loop but I understand what you are saying thanks

Your first union does the job. So maybe you give "uint8_t byLSBH;"another name to make it clear it is not relevant?

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Thank you! I have tried several times over the last 15 years to get this to work and today I know why!

Dear Victor Nijegorodov Before of all, many thanks for your advice. The structure of solution is as follows: Calculations are to be done in CLASS A; and class CXXView : public CView, public CALSS A CXXView dose not know when these Calculations are done; When CLASS A send a message to CXXView, then CXXView execute other methods; The message is InvalidateRect; The problem is that CXXView dose not know when these Calculations are done. On the ther hand, I don't want to define a flag and check it continuously if Calculations are done or not? so CXXView has to await receiving InvalidateRect message from CLASS A I tried to define an instance of CXXView class within the CLASS A: CXXView* pCurrentView; CRect rect = pCurrentView->m_Rect_zone; HWND pWnd = pCurrentView->GetSafeHwnd(); InvalidateRect(NULL, NULL, FALSE); but I was not succeeded because of this compiler error: Uninitialized variable pCurrentView One macro or something like that is missing here (CXXView* pCurrentView;) which I am not familiar with that. Best Regards

So what have you tried, and where are you stuck? If you are expecting someone to do your work for you I am afraid disappointment awaits you.