开发界面之窗口边框重绘

基于上篇已经解决了富图软件窗口child的效果。这边主要仿照其重绘边框——即活动窗口边框高亮，本文不讲标题栏/border重绘（难度是比Client绘制要难，但是社区也有人做了相应的demo），基于富图考虑，它不要标题栏，我们也用无边框窗口绘制就好了。

1.边框及标题栏绘制

void CDlgFrm::OnPaint()
{
	CPaintDC dc(this); // device context for painting
	// TODO:  在此处添加消息处理程序代码
	// 不为绘图消息调用 CDialogEx::OnPaint()
	
	//画边框
	HPEN newPen = CreatePen(PS_SOLID, 2, m_colFrm);
	HPEN oPen = (HPEN)dc.SelectObject(newPen);
	CRect rc, rc2;
	GetClientRect(rc);
	rc.left = rc.top = 2;
	dc.Rectangle(rc);
	dc.SelectObject(oPen);
	//画标题栏
	oPen = (HPEN)dc.SelectObject(GetStockObject(NULL_PEN));
	HBRUSH newBrsh = CreateSolidBrush(RGB(130, 130, 130));
	HBRUSH oldBrsh = (HBRUSH)dc.SelectObject(newBrsh);
	dc.Rectangle(3, 3, rc.Width()+1, 33);
	dc.SelectObject(oldBrsh);
	::DeleteObject(newBrsh);
	dc.SelectObject(oPen);
	//画标题文字
	if (m_strTitle.IsEmpty() == FALSE)
	{
		rc = CRect(0, 0, 100, 30);
		dc.SetTextColor(RGB(255, 250, 250));
		dc.SetBkMode(TRANSPARENT);
		dc.DrawText(m_strTitle, rc, DT_VCENTER | DT_CENTER | DT_SINGLELINE);
	}
	
}

2.此时还不能move/resize窗口，于是重写OnNcHitTest

LRESULT CDlgFrm::OnNcHitTest(CPoint point)
{
	// TODO:  在此添加消息处理程序代码和/或调用默认值
	UINT nHitTest = CDialogEx::OnNcHitTest(point);

	CPoint pt(0, 0);
	ClientToScreen(&pt);
	if (nHitTest == HTCLIENT && point.y - pt.y < 32)
	{
		nHitTest = HTCAPTION;
	}
	RECT rcWindow;
	::GetWind