MFC ListBox Control: How CCheckListBox notifies "checkbox status changed"?

[ovidiucucu]

Q: How CCheckListBox notifies "checkbox status changed"?

A: When the user changes a checkbox status in a CCheckListBox, an undocumented MFC-specific message is sent to parent window: CLBN_CHKCHANGE.
We can handle this message like in the following example:

// MyDialog.h
class CMyDialog : public CDialog
{
// ...
   afx_msg void OnCheckChangeMyList();
};

// MyDialog.cpp
// ...
   ON_CONTROL(CLBN_CHKCHANGE, IDC_MY_LIST, OnCheckChangeMyList)
END_MESSAGE_MAP()

void CMyDialog::OnCheckChangeMyList()
{
   // got it!
}

Note: instead of ON_CONTROL, we can directly use ON_CLBN_CHKCHANGE macro.

// ...
   ON_CLBN_CHKCHANGE(IDC_MY_LIST, OnCheckChangeMyList)
// ...

See also

• How to handle check notifications in CCheckListBox in Visual C++
• How CListCtrl notifies "checkbox status changed"?