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Asked: 2026-05-13T11:07:10+00:00

I am building MFC application where there is CDialog with child control derived from

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I am building MFC application where there is CDialog with child control derived from CStatic on it.

I want to receive mouse events for CStatic control so I set "Notify" for it to true. Now I am able to receive message events through message map directly in MyStatic:


class CMyStatic : public CStatic
{
afx_msg void OnLButtonDown(UINT nFlags, CPoint point); // Gets invoked
DECLARE_MESSAGE_MAP()
}

The problem is that from now the parent CDialog is not receiving mouse events when mouse is over MyStatic child. I can send them from MyStatic manually but is there any way to let them go through automatically? And still be able to receive them also on MyStatic using message maps?

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1 Answer

  1. Editorial Team

    No, you’re misunderstanding. SS_NOTIFY does not cause your CStatic to receive messages, it causes the CStatic to relay messages back to the parent. So “Now I am able to receive message events through message map directly in MyStatic” is based on a false premise.

    This is an important point to make because a control can only receive messages for itself, not for its children, unless those children ‘play along’ by relaying messages or by doing other tricks (global hooking, …) ; but those cases are the exception, the ‘normal’ way is that each window receives messages for itself.

    So that answers your question: no, there is no way to let both a parent (your CDialog) and a child (your CStatic) receive mouse events without doing so ‘manually’ or getting involved in tedious message routing hacks. So in your case, what you need to do is GetParent()->SendMessage(WM_LBUTTONDOWN, …) etc, manually recreating the WPARAM and LPARAM values; or calling OnLButtonDown directly on the CDialog: GetParent()->OnLButtonDown(…). You’ll have to think about what mouse coordinates you pass back to CDialog though, you may need to translate them to the CDialog’s client coordinates.

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