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MFC, window handle

Posted on 2002-03-14
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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?
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Question by:j4months
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5 Comments
 
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Accepted Solution

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jkr earned 200 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;
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Author Comment

by:j4months
ID: 6865281
what about CDialog?
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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"...
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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.
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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;

// ...

};
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