guivi

On Mouse Leave MFC

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by

guivi
in ,

simple article about how to use ON_WM_MOUSELEAVE leave on a button.

The button has to track the mouse while moues move (ON_WM_MOUSEMOVE) is called.

void CMYButton::OnMouseMove(UINT nFlags, CPoint point)
{

if (!m_bTracking)
{
    TRACKMOUSEEVENT tme;
    tme.cbSize = sizeof(tme);
    tme.hwndTrack = m_hWnd;
    tme.dwFlags = TME_LEAVE|TME_HOVER;
    tme.dwHoverTime = 1;

    m_bTracking = _TrackMouseEvent(&tme);
    m_point = point;
}

LRESULT CMYButton::OnMouseHover(WPARAM wparam, LPARAM lparam)
{
    m_txtInfo->SetWindowText(m_strInformation);
    return m_bTracking;
}

LRESULT CMYButton::OnMouseLeave(WPARAM wparam,LPARAM lparam)
{
    m_txtInfo->SetWindowText("");
    m_bTracking = FALSE;
    return 0;
}

Source:
https://microsoft.public.vc.mfc.narkive.com/YBQSIfWf/on-mouseleave-and-cbutton-with-windows-xp-desktop-theme