Solved

Message Handling

Posted on 2003-11-23
2
430 Views
Last Modified: 2012-05-04
Hi All!

I am trying to convert a custom control written in C++ to Delphi. I do not have much C++ background. Can anybody tell me how to convert the below code to Delphi:

BEGIN_MESSAGE_MAP(CSomeClassEx, CSomeClass)
  ON_NOTIFY_REFLECT(A Notification, A Handler)
END_MESSAGE_MAP()

To handle messages received by the control I normally override WndProc method, but this notification is received by the Parent window of the control through WM_NOTIFY message. What is the best way to convert this code?

Thanks in advance...
0
Comment
Question by:hacibumbala
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Accepted Solution

by:
hzg115 earned 125 total points
ID: 9808761
see the VCL source code

WMNotify(var Message: TWMNotify); message WM_NOTIFY;

procedure TWinControl.WMNotify(var Message: TWMNotify);
begin
  if not DoControlMsg(Message.NMHdr^.hWndFrom, Message) then inherited;
end;
0
 
LVL 1

Author Comment

by:hacibumbala
ID: 9820206
I checked the VCL code and realized that correct declaration should be:

procedure CNNotify(var Message: TWMNotify); message CN_NOTIFY;

However, your information helped a lot. Thank you for the answer!
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
This is a high-level webinar that covers the history of enterprise open source database use. It addresses both the advantages companies see in using open source database technologies, as well as the fears and reservations they might have. In this…
This video Micro Tutorial shows how to password-protect PDF files with free software. Many software products can do this, such as Adobe Acrobat (but not Adobe Reader), Nuance PaperPort, and Nuance Power PDF, but they are not free products. This vide…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question