修改CMyEdit(派生自CEdit)边框的颜色的方法

void CMyEdit::OnPaint()
{
	CPaintDC dc(this); // device context for painting
	// TODO: Add your message handler code here
	// Do not call CEdit::OnPaint() for painting messages

	CRect rect;
	GetWindowRect(rect);
	CRect rect2 = rect;
	rect2.left += 1;
	rect2.right -= 1;
	rect2.top += 1;
	rect2.bottom -= 1;

	ScreenToClient(rect);
	ScreenToClient(rect2);
	//CPen pen(PS_SOLID, 2, RGB(255,0,0));
	//CPen * pOldPen = dc.SelectObject(&pen);
	dc.Draw3dRect(rect, RGB(255, 0, 0), RGB(255, 0, 0));
	dc.Draw3dRect(rect2, RGB(255, 0, 0), RGB(255, 0, 0));
	Invalidate();
	Default();
	//dc.SelectObject(pOldPen);
}

如果你想要手动创建这样的窗口,可以用如下的方法:

	m_myEdit.CreateEx(WS_EX_CLIENTEDGE, _T("EDIT"), NULL, WS_CHILD|WS_VISIBLE|ES_LEFT, CRect(40,40,140,140), this, 0);

注意:不要加WS_BORDER风格

原理介绍：

• WS_EX_CLIENTEDGE Specifies that a window has a 3D look — that is, a border with a sunken edge.

  CreateEx时窗口大小为100,100。倘若加上WS_EX_CLIENTEDGE则窗口客户区为96,96,

  我们就是自己重新绘制了这被削减的四个方向上的边框。