toolbar重绘函数EraseNonClient//DrawBorders(&dc, rectWindow);//函数什么意思呢???

[mirroatl47]

void CToolBarEx::EraseNonClient()
{
	// get window DC that is clipped to the non-client area
	CWindowDC dc(this);
	CRect rectClient;
	GetClientRect(rectClient);
	CRect rectWindow;
	GetWindowRect(rectWindow);
	ScreenToClient(rectWindow);
	rectClient.OffsetRect(-rectWindow.left, -rectWindow.top);
	dc.ExcludeClipRect(rectClient);
	
	// draw borders in non-client area
	rectWindow.OffsetRect(-rectWindow.left, -rectWindow.top);
	DrawBorders(&dc, rectWindow);//函数什么意思呢???
	
	// erase parts not drawn
	dc.IntersectClipRect(rectWindow);
	SendMessage(WM_ERASEBKGND, (WPARAM)dc.m_hDC);//函数是什么作用呢???
	
	DrawGripper(&dc, rectWindow); //
}

[快乐鹦鹉]

注释写了啊，DrawBorder是要在非客户区域绘制边界线条 EraseNonClient是擦除非客户区域内容，就是进行重画啦 SendMessage(WM_ERASEBKGND, (WPARAM)dc.m_hDC);告诉工具条，响应WM_EARSEBKGND，重画工具条背景