【内存释放问题】

[大树学长]

OnPaint()函数中：

CPaintDC dc(this); 
//背景
	CRect rect;
	GetClientRect(&rect);
	CDC   dcMem;
	dcMem.CreateCompatibleDC(&dc);
	CBitmap   bmpBackground;
	bmpBackground.LoadBitmap(IDB_BITMAP7);  //对话框的背景图片
	BITMAP   bitmap;
	bmpBackground.GetBitmap(&bitmap);
	CBitmap   *pbmpOld = dcMem.SelectObject(&bmpBackground);
	dc.SetStretchBltMode(COLORONCOLOR);
	dc.StretchBlt(0, 0, rect.Width(), rect.Height(), &dcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
	
	
	CDC *pDC = this->GetDC();
	
	CPen* pPenRed = new CPen;
	pPenRed->CreatePen(PS_SOLID, 2, RGB(180, 181, 181));
	CGdiObject* pOldPen = pDC->SelectObject(pPenRed);

使用完了，
pDC->SelectObject(pPenRed);
ReleaseDC(pDC);
dcMem.SelectObject(pbmpOld);//这个对么
还有内存泄露，大神帮忙看看还有的要怎么写？

[worldy]

代码要贴全，不然人家也无法判断你是否有问题

[大树学长]

VS中内存泄露检测： Memory Leaked : 0 bytes in 0 Free Blocks. -2431 bytes in -80 Normal Blocks. 0 bytes in 0 CRT Blocks. 0 bytes in 0 Ignore Blocks. -33476 bytes in 381 Client Blocks. Largest number used: 7867 bytes. Total allocations: 50036 bytes. f:\dd\vctools\vc7libs\ship\atlmfc\src\mfc\dumpcont.cpp(23) : atlTraceGeneral - Dump Complete !

[zgl7903]

new 和 delete 要配对 SelectObject 选人的 也需要恢复, 否则可能造成资源被锁定而无法释放

CPen* pPenRed = new CPen;
pPenRed->CreatePen(PS_SOLID, 2, RGB(180, 181, 181));
CGdiObject* pOldPen = pDC->SelectObject(pPenRed);

……

pDC->SelectObject( pOldPen ); //恢复画笔
delete pPenRed;  pPenRed =NULL; //释放

[大树学长]

引用 3 楼 zgl7903 的回复:

new 和 delete 要配对 SelectObject 选人的 也需要恢复, 否则可能造成资源被锁定而无法释放

CPen* pPenRed = new CPen;
pPenRed->CreatePen(PS_SOLID, 2, RGB(180, 181, 181));
CGdiObject* pOldPen = pDC->SelectObject(pPenRed);

……

pDC->SelectObject( pOldPen ); //恢复画笔
delete pPenRed;  pPenRed =NULL; //释放

对对对，我找了，也不会释放这个，还有一个是 CFont* m_Font; m_Font = new CFont; m_Font->CreateFont(20, 0, 0, 0, 400, 0, 0, 0, ANSI_CHARSET, OUT_STROKE_PRECIS, CLIP_STROKE_PRECIS, DRAFT_QUALITY, VARIABLE_PITCH | FF_SWISS, "微软雅黑");// "Myriad Pro Cond"); 这个m_Font也是要delete，还是怎么释放？

[信阳毛尖]

OnPaint()函数贴完整！