MFC Mouse Event Handling Questions.

WM_LBUTTONDOWN, WM_MOUSEMOVE, WM_RBUTTONDOWN 등 If all mouse events are handled in the same location, the coordinate values of the mouse where the event occurred are the same

Only WM_MOUSEWHEEL has different coordinates of the mouse where the event occurred. I wonder why.

Click Event

void CPr2View::OnLButtonDown(UINT nFlags, CPoint point)
{
    m_strPointText.Format(_T("%d %d "), point.x, point.y);
    OutputDebugString(m_strPointText);
    Invalidate();

    CView::OnLButtonDown(nFlags, point);
}

Wheel events

BOOL CPr2View::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
    if (zDelta < 0)
    {
        m_strPointText.Format(_T("%d %d "), pt.x, pt.y);
        OutputDebugString(m_strPointText);
    }
    else
    {
        m_strPointText.Format(_T("%d %d "), pt.x, pt.y);
        OutputDebugString(m_strPointText);
    }

    return CView::OnMouseWheel(nFlags, zDelta, pt);
}

The result is left click in the same position in the executed window, moving the wheel. (49, 617) (267, 902) has different coordinate values.

Same coordinates as when left-clicked (49, 617), except for wheel events such as right-click and mouse movement.

And how do you get these coordinate values to be the same?