Solved

MFC, window handle

Posted on 2002-03-14
5
1,307 Views
Last Modified: 2010-05-18
When using MFC, I do not explicitly call 'CreateWindow.' So how do I get the handle of the window created?
0
Comment
Question by:j4months
[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
  • 3
  • 2
5 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 50 total points
ID: 6865208
As all "windowing" classes are derived from CWnd, the window handle is available as "m_hWnd", e.g.

CMyWnd* pWnd = ...;

HWND hWnd = pWnd->m_hWnd;
0
 

Author Comment

by:j4months
ID: 6865281
what about CDialog?
0
 
LVL 86

Expert Comment

by:jkr
ID: 6865291
CDialog is derived from CWnd, so it's the same - each instance has a member "m_hWnd"...
0
 

Author Comment

by:j4months
ID: 6865318
Yes, it compiles.
Can you tell me in what file is 'm_hWnd' declared? It shows nothing when I do 'find in files.'
Thanks.
0
 
LVL 86

Expert Comment

by:jkr
ID: 6865340
It's declared in "afxwin.h":

class CWnd : public CCmdTarget
{
    DECLARE_DYNCREATE(CWnd)
protected:
    static const MSG* PASCAL GetCurrentMessage();

// Attributes
public:
    HWND m_hWnd;            // must be first data member
    operator HWND() const;

// ...

};
0

Featured Post

[Webinar] Learn How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

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

Unlike C#, C++ doesn't have native support for sealing classes (so they cannot be sub-classed). At the cost of a virtual base class pointer it is possible to implement a pseudo sealing mechanism The trick is to virtually inherit from a base class…
What is C++ STL?: STL stands for Standard Template Library and is a part of standard C++ libraries. It contains many useful data structures (containers) and algorithms, which can spare you a lot of the time. Today we will look at the STL Vector. …
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

626 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