窗口无法修改其Owner

API函数GetWindow(hWnd, GW_OWNER)可以得到hWnd的owner窗口, GetParent(hWnd)也可以得到parent或者owner,
但微软怎么不做个SetWindow这样的API函数来真正修改其owner呢?, MFC虽然有SetOwner函数, 但查了一下源码,
发现只是把owner窗口保存起来而已, 并不是像parent/child那样在窗口级别建立了一个链接关系, 郁闷

void CWnd::SetOwner(CWnd* pOwnerWnd)
{ 
   m_hWndOwner = pOwnerWnd != NULL ? pOwnerWnd->m_hWnd : NULL;
}
 
CWnd* CWnd::GetOwner() const
{
   return m_hWndOwner != NULL ? CWnd::FromHandle(m_hWndOwner) : GetParent();
}

再来看看VC2008中的一个隐藏函数, 该函数在MSDN中没有文档支持

HWND AFXAPI AfxGetParentOwner(HWND hWnd)
{
    // check for permanent-owned window first
    CWnd* pWnd = CWnd::FromHandlePermanent(hWnd);
    if (pWnd != NULL)
       return pWnd->GetOwner()->GetSafeHwnd();
 
    // otherwise, return parent in the Windows sense
    return (::GetWindowLong(hWnd, GWL_STYLE) & WS_CHILD) ?
        ::GetParent(hWnd) : ::GetWindow(hWnd, GW_OWNER);
}

C++

2009-01-08 Comments

窗口无法修改其Owner

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