强调“= WM_CTLCOLOR”是消息反射的，是WM_NCPAINT而不是WM_PAINT！

//####################################################################
//	Comments:	圆角Edit控件
//
//	UpdateLogs:	
//####################################################################
#pragma once 

class CMyEdit : public CEdit
{
	DECLARE_DYNAMIC(CMyEdit)

public:
	CMyEdit();
	virtual ~CMyEdit();

protected:
	DECLARE_MESSAGE_MAP()

private:

	COLORREF		m_clrBackground;	//背景颜色
	COLORREF		m_clrFrame;			//边框颜色
	COLORREF		m_clrText;			//文字颜色

	COLORREF		m_clrDisableBkg;	//禁用背景色
	COLORREF		m_clrDisableTxt;	//禁用文字色
	
	CBrush			m_brushBkg;			//背景画刷

	CFont*			m_pfTitle;

public:
	afx_msg void OnNcPaint();
	afx_msg HBRUSH CtlColor(CDC* /*pDC*/, UINT /*nCtlColor*/);
};

//####################################################################
//	Comments:	圆角Edit控件
//
//	UpdateLogs:	
//####################################################################
#include "stdafx.h" 
#include "MyEdit.h"
#include "../MemDC.h"
#include "../CommonFunc.h"

#ifdef _DEBUG
#define new DEBUG_NEW 
#endif

IMPLEMENT_DYNAMIC(CMyEdit, CEdit)
CMyEdit::CMyEdit()
{
	//m_crText = RGB(40, 40, 40);
	//m_crBorder = RGB(228,228,228);

	m_clrBackground	= RGB(255, 255, 255);	//背景颜色
	m_clrFrame		= RGB(228, 228, 228);	//边框颜色
	m_clrText		= RGB(174, 174, 174);	//文字颜色
	
	m_clrDisableTxt	= RGB(200, 200, 200);	//禁用文字色
	m_clrDisableBkg	= RGB(255, 255, 255);	//禁用背景色

	m_brushBkg.CreateSolidBrush(m_clrBackground); //创建背景画刷

	m_pfTitle = ::GetFont(_T("微软雅黑"), 12);
}

CMyEdit::~CMyEdit()
{
}

BEGIN_MESSAGE_MAP(CMyEdit, CEdit)
	ON_WM_NCPAINT()
	ON_WM_CTLCOLOR_REFLECT()
END_MESSAGE_MAP()


// CWEEditCtrl 消息处理程序
HBRUSH CMyEdit::CtlColor(CDC* pDC, UINT /*nCtlColor*/)
{
	//pDC->SetBkMode(TRANSPARENT);
	if(IsWindowEnabled())
	{
		m_brushBkg.DeleteObject();
		m_brushBkg.CreateSolidBrush(m_clrBackground);
		pDC->SetTextColor(m_clrText);		//设置文字颜色
		pDC->SetBkColor(m_clrBackground);	//设置背景色
	}
	else
	{
		m_brushBkg.DeleteObject();
		m_brushBkg.CreateSolidBrush(m_clrDisableBkg);
		pDC->SetTextColor(m_clrDisableTxt);	//设置文字颜色
		pDC->SetBkColor(m_clrDisableBkg);	//设置背景色
	}

	return (HBRUSH)m_brushBkg.GetSafeHandle();
}

void CMyEdit::OnNcPaint()
{
	CRect	rectEdit;
	CDC*	pDC = GetWindowDC();

	//设置编辑框的区域
	GetWindowRect(rectEdit);
	ScreenToClient(rectEdit);
	rectEdit.OffsetRect(CSize(2, 2));

	CPen mypen, *oldpen;
	mypen.CreatePen(PS_SOLID, 1, m_clrFrame);
	oldpen = pDC->SelectObject(&mypen);

	CPoint point(7, 7);
	pDC->RoundRect(rectEdit, point);

	pDC->SelectObject(oldpen);

	//设置字体
	SetFont(m_pfTitle);

	ReleaseDC(pDC);
}