鼠标经过时出现下拉菜单，移走后菜单消失

[lst0426]

鼠标经过时出现下拉菜单，移走后菜单消失，如何实现，最好有代码示例

[schlafenhamster]

void MyButton::OnMouseMove(UINT nFlags, CPoint point)
{
	if(!m_tracking)
	{
		TRACKMOUSEEVENT tme;
		tme.cbSize = sizeof(tme);
		tme.dwFlags = TME_HOVER|TME_LEAVE;
		tme.dwHoverTime =1;
		tme.hwndTrack = m_hWnd;
		m_tracking = _TrackMouseEvent(&tme);
	}
//
#if 1
	if(MK_LBUTTON==nFlags)
	{
		CRect rc;
		GetClientRect(&rc);
		MapWindowPoints(GetParent(),&rc);
		MapWindowPoints(GetParent(),&point,1);
		MoveWindow(point.x-m_MouseLast.x, point.y-m_MouseLast.y, rc.Width(), rc.Height());
	}
#endif 
}
LRESULT MyButton::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
	//afxDump << "leave\n" ;
	if(m_hover)
	{
		m_hover = false;
		m_tracking = FALSE;
		Invalidate();
	}
	return 0;
}
//
LRESULT MyButton::OnMouseHover(WPARAM wParam, LPARAM lParam)
{
	//afxDump << "hover\n" ;
	if(!m_hover)
	{
		m_hover = true;
		m_tracking = FALSE;
		Invalidate();
	}
	return 0;
}

[lst0426]

m_MouseLast，这个哪来 的

[Anow_D]

绑定MouseOver和MouseLeave触发事件

[schlafenhamster]

void MyButton::OnLButtonDown(UINT nFlags, CPoint point) 
{
// transform left-top to point
	CRect rc;
	GetClientRect(&rc);
	MapWindowPoints(GetParent(),&rc);
	MapWindowPoints(GetParent(),&point,1);
	m_MouseLast.x=point.x-rc.left;
	m_MouseLast.y=point.y-rc.top;
//	afxDump << m_MouseLast << "\n";
//
	CButton::OnLButtonDown(nFlags, point);
}

[lst0426]

菜单消失是指下拉菜单收回那种，不是真正的丢失菜单 if(MK_LBUTTON==nFlags) { CRect rc; GetClientRect(&rc); MapWindowPoints(GetParent(),&rc); MapWindowPoints(GetParent(),&point,1); MoveWindow(point.x-m_MouseLast.x, point.y-m_MouseLast.y, rc.Width(), rc.Height()); } 这段代码把菜单弄没了

[lst0426]

鼠标点一下，下拉菜单弹出，然后鼠标移动到其他按钮，弹出的菜单收回，移动到那个按钮，那个按钮菜单弹出

[lst0426]

论坛的搜索功能怎么不能按vc，vb，jv板块来搜索呢