方法1:VS 2010にクラスCMemDCがあり、MFCの下で図面の点滅を解決することができる.
MSDN時計を見てみましょう.
 
 
CMemDC Class
A helper class for a memory device context. The memory device context supports offscreen drawing.
 
 
ライブラリでの宣言は次のとおりです.
 
 
class CMemDC
{
public:
AFX_IMPORT_DATA static BOOL m_bUseMemoryDC;
 
CMemDC(CDC& dc, CWnd* pWnd);
CMemDC(CDC& dc, const CRect& rect);
 
virtual ~CMemDC();
 
CDC& GetDC() { return m_bMemDC ? m_dcMem : m_dc; }
BOOL IsMemDC() const { return m_bMemDC; }
BOOL IsVistaDC() const { return m_hBufferedPaint != NULL; }
 
protected:
CDC&     m_dc;
BOOL     m_bMemDC;
HANDLE   m_hBufferedPaint;
CDC      m_dcMem;
CBitmap  m_bmp;
CBitmap* m_pOldBmp;
CRect    m_rect;
};
 
 
使用方法:
 

// 1、 WM_ERASEBKGND ， FALSE， 。 
BOOL CDemoView::OnEraseBkgnd(CDC* pDC)  
{ 
 	 return FALSE; 
} 

// 2、 CMemDC。 
  
  
void CDemoView::OnDraw(CDC* pDC) 
{ 
CGestureDemoDoc* pDoc = GetDocument(); 
ASSERT_VALID(pDoc); 
  
CMemDC dcMem(*pDC, this); 
CDC& dc = dcMem.GetDC(); 
//do anything with graphic object dc; 
...... 
} 
  
  
 :ネット でCMemDCを してCDCを するもう つの は の りである.
  
MemDC.h
  
  
#ifndef _MEMDC_H_ 
#define _MEMDC_H_ 
//////////////////////////////////////////////////
//CMemDC - memory DC 
//
//Author: Keith Rule 
//Email:  [email protected] 
//Copyright 1996-1999, Keith Rule 
//
//You may freely use or modify this code provided this 
//Copyright is included in all derived versions. 
//
//History - 10/3/97 Fixed scrolling bug. 
//                  Added print support. - KR 
//
//          11/3/99 Fixed most common complaint. Added 
//                  background color fill. - KR 
//
//          11/3/99 Added support for mapping modes other than 
//                  MM_TEXT as suggested by Lee Sang Hun. - KR 
//
//This class implements a memory Device Context which allows 
//flicker free drawing. 
class CMemDC : public CDC { 
protected: 
   CBitmap  m_bitmap;      //Offscreen bitmap 
   CBitmap* m_oldBitmap;    //bitmap originally found in CMemDC 
   CDC*     m_pDC;          //Saves CDC passed in constructor 
   CRect    m_rect;        //Rectangle of drawing area. 
   BOOL     m_bMemDC;      //TRUE if CDC really is a Memory DC. 
  
   void Construct(CDC* pDC) 
   { 
        ASSERT(pDC != NULL);  
        //Some initialization 
        m_pDC = pDC; 
        m_oldBitmap = NULL; 
        m_bMemDC = !pDC->IsPrinting(); 
        if (m_bMemDC) { 
            //Create a Memory DC 
            CreateCompatibleDC(pDC); 
            pDC->LPtoDP(&m_rect); 
            m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), m_rect.Height()); 
            m_oldBitmap = SelectObject(&m_bitmap); 
  
            SetMapMode(pDC->GetMapMode()); 
            pDC->DPtoLP(&m_rect); 
            SetWindowOrg(m_rect.left, m_rect.top); 
        } else { 
            //Make a copy of the relevent parts of the current DC for printing 
            m_bPrinting = pDC->m_bPrinting; 
            m_hDC       = pDC->m_hDC; 
            m_hAttribDC = pDC->m_hAttribDC; 
        } 
        //Fill background  
        FillSolidRect(m_rect, pDC->GetBkColor()); 
    } 
//TRK begin 
public: 
   CMemDC(CDC* pDC                  ) : CDC() { pDC->GetClipBox(&m_rect); Construct(pDC); } 
   CMemDC(CDC* pDC, const RECT& rect) : CDC() { m_rect = rect           ; Construct(pDC); } 
//TRK end 
  
   virtual ~CMemDC() 
   {         
        if (m_bMemDC) { 
            //Copy the offscreen bitmap onto the screen. 
            m_pDC->BitBlt(m_rect.left, m_rect.top, m_rect.Width(), m_rect.Height(), 
                this, m_rect.left, m_rect.top, SRCCOPY);             
  
            //Swap back the original bitmap. 
            SelectObject(m_oldBitmap);         
        } else { 
            //All we need to do is replace the DC with an illegal value, 
            //this keeps us from accidently deleting the handles associated with 
            //the CDC that was passed to the constructor.             
            m_hDC = m_hAttribDC = NULL; 
        }     
    } 
  
    //Allow usage as a pointer     
    CMemDC* operator->()  
    { 
        return this; 
    }     
    //Allow usage as a pointer     
    operator CMemDC*()  
    { 
        return this; 
    } 
}; 
#endif 
  
  
 のクラスは のとおりです.
  
/////////////////////////////////////////////////////////// 
//  How to use: 
/////////////////////////////////////////////////////////// 
// 1、 WM_ERASEBKGND ， FALSE， 。 
BOOL CDemoView::OnEraseBkgnd(CDC* pDC)  
{ 
 	 return FALSE; 
} 
/////////////////////////////////////////////////////////// 
// 2、 CMemDC。 
 void CDemoView::OnDraw(CDC* pDC) 
 { 
	 CFont  font; 
	 font.CreateFontIndirect(&m_lf); 
	 CMemDC  pMemDC(pDC); 
	 CFont* oldfont = pMemDC->SelectObject(&font); 
   //..Draw something here. 
	 pMemDC->SelectObject(oldfont); 
 } 
/////////////////////////////////////////////////////////// 
//  include ！ 
///////////////////////////////////////////////////////////