Two problems re-compiling an old MFC project

[luckie7456969]

1)

BEGIN_MESSAGE_MAP(CCoolBar, baseCCoolBar)
    //{{AFX_MSG_MAP(CCoolBar)
    ON_WM_NCHITTEST()
    ON_WM_NCLBUTTONUP()
	ON_WM_SIZE()
	//}}AFX_MSG_MAP
    ON_MESSAGE(WM_SETTEXT, OnSetText)
	ON_MESSAGE(WM_NOTIFY, OnNotify)
END_MESSAGE_MAP()

Error 3 error C2440: 'static_cast' : cannot convert from 'BOOL (__thiscall CCoolBar::* )(WPARAM,LPARAM,LRESULT *)' to 'LRESULT (__thiscall CWnd::* )(WPARAM,LPARAM)' e:\exetoc_src_20050524\exe2c_gui\scbarg.cpp 57 1 exe2c_gui

Comment(s):
I've tried to change that prototype definition (OnNotify) to return a value of LRESULT
But it complains about CWnd::OnNotify that it returns a different value from
the base class (CWnd), (something like that, can't remember)

2)

CRorTextView::CRorTextView()
{
	AFX_ZERO_INIT_OBJECT(CScrollView);
	ResetView();
}

Error 4 error C2275: 'CScrollView' : illegal use of this type as an expression e:\exetoc_src_20050524\exe2c_gui\crortextview.cpp 114 1 exe2c_gui
Error 5 error C3861: 'AFX_ZERO_INIT_OBJECT': identifier not found e:\exetoc_src_20050524\exe2c_gui\crortextview.cpp 114 1 exe2c_gui


Comment(s):
The macro seems to be deprecated in the new MS SDK 7.0a. What is the proper replacement for this macro?

So please help.
Thanks
Jack

[Igor Vartanov]

1) There might be a name conflict, and therefore you have to specify class name, like following:

    ON_MESSAGE(WM_SETTEXT, &CWnd::OnSetText)

[VictorN]

1. Did you ever read the TN061: ON_NOTIFY and WM_NOTIFY Messages?
If you really wants to handle WM_NOTIFY see the section ON_NOTIFY: Handling WM_NOTIFY Messages in MFC Applications


2. According to https://connect.microsoft.com/Visual...lous-behavior:

The dangerous AFX_ZERO_INIT_OBJECT has been removed, and usages of it replaced with explicit initializations.

Why do you use it?

[luckie7456969]

Hi Victor,
Does Explicit Initializations mean something like this?

memset (&object, 0, sizeof(object));

[VictorN]

Why don't you want to look at the source code of CScrollView class? Just open viewscrl.cpp and search for CScrollView ctor!

[OReubens]

Hi Victor,
Does Explicit Initializations mean something like this?

memset (&object, 0, sizeof(object));

no, that's what the old macro did
which doesn't have any name other than "really badly written code".

Explicit initialization means that you 'call' a constructor, and the constructor takes care of initializing it's members.

[luckie7456969]

Wow, Explicit initialization is just as simple as that.
Thanks OReubens.
Jack