Export (0) Print
Expand All
Expand Minimize

CWnd::SubclassDlgItem

Call this member function to "dynamically subclass" a control created from a dialog template and attach it to this CWnd object.

BOOL SubclassDlgItem(
   UINT nID,
   CWnd* pParent 
);

Parameters

nID
The control's ID.
pParent
The control's parent (usually a dialog box).

Return Value

Nonzero if the function is successful; otherwise 0.

Remarks

When a control is dynamically subclassed, windows messages will route through the CWnd's message map and call message handlers in the CWnd's class first. Messages that are passed to the base class will be passed to the default message handler in the control.

This member function attaches the Windows control to a CWnd object and replaces the control's WndProc and AfxWndProc functions. The function stores the old WndProc in the location returned by the GetSuperWndProcAddr member function.

Example

class CMyButton : public CButton {...};
// m_myButton is a CMyButton object member of CAboutDlg

BOOL CAboutDlg::OnInitDialog() 
{
   CDialog::OnInitDialog();
   // IDC_BUTTON1 is the ID for a button on the 
   // dialog template used for CAboutDlg.
   m_myButton.SubclassDlgItem(IDC_BUTTON1, this);   

   return TRUE;   // Return TRUE unless you set the focus to a control
                  // EXCEPTION: OCX Property Pages should return FALSE
}

See Also

CWnd Overview | Class Members | Hierarchy Chart | CWnd::GetSuperWndProcAddr | CWnd::DefWindowProc | CWnd::SubclassWindow | CWnd::Attach

Show:
© 2014 Microsoft