资源分配、释放表

资源	分配函数	清除函数	需要手动清除
Accelerators	LoadAccelerators	N/A	No
Atoms	GlobalAddAtom	GlobalFreeAtom	Yes
Bitmaps	CreateBitmap	DeleteObject	Yes *
	CreateBitmapIndirect	DeleteObject	Yes *
	CreateCompatibleBitmap	DeleteObject	Yes*
	CreateDIBitmap	DeleteObject	Yes*
	CreateDiscardableBitmap	DeleteObject	Yes*
	LoadBitmap	DeleteObject	Yes
Brushes	CreateBrushIndirect	DeleteObject	Yes
	CreateDIBPatternBrush	DeleteObject	Yes
	CreateHatchBrush	DeleteObject	Yes
	CreatePatternBrush	DeleteObject	Yes
	CreateSolidBrush	DeleteObject	Yes
Carets	CreateCaret	DestroyCaret	No#
Clipboard	OpenClipboard	CloseClipboard	Yes
Comms Ports	OpenComm	CloseComm	Yes
Cursor	CreateCursor	DestroyCursor	Yes
	LoadCursor	N/A	No
DC	CreateDC	DeleteDC	Yes
	CreateCompatibleDC	DeleteDC	Yes@
	GetDC	ReleaseDC	Yes
	GetWindowDC	ReleaseDC	Yes
	BeginPaint	EndPaint	Yes
DialogBox	CreateDialog	DestroyWindow	No
	CreateDialogIndirect	DestroyWindow	No
	CreateDialogIndirectParam	DestroyWindow	No
	CreateDialogParam	DestroyWindow	No
File	OpenFile	_lclose	No
Fonts	CreateFont	DeleteObject	Yes
	CreateFontIndirect	DeleteObject	Yes
	AddFontResource	RemoveFontResource	Yes
GDIStockObj	GetStockObject	N/A	No&
Hook	SetWindowsHook	UnhookWindowsHook	Yes
IC	CreateIC	DeleteDC	Yes
Icon	CreateIcon	DestroyIcon	Yes
	LoadIcon	N/A	No
Library	LoadLibrary	FreeLibrary	Yes
Memory	AllocDStoCSAlias	FreeSelector	Yes
	AllocSelector	FreeSelector	Yes
	GlobalAlloc	GlobalFree	No
	GlobalDOSAlloc	GlobalDOSFr	No
	GlobalFix	GlobalUnfix	No
	GlobalLock	GlobalUnlock	No
	GlobalPageLock	GlobalPageUnlock	No
	GlobalRealloc	GlobalFree	No
	GlobalWire	GlobalUnwire	No
	LocalAlloc	LocalFree	No
	LocalLock	LocalUnlock	No
	LocalRealloc	LocalFree	No
Menu	CreateMenu	DestroyMenu	No%
	CreatePopupMenu	DestroyMenu	No%
	LoadMenu	DestroyMenu	No%
	LoadMenuIndirect	DestroyMenu	No%
	GetSystemMenu	N/A	No
MetaFile	CreateMetaFile	DeleteMetaFile	Yes
Palette	CreatePalette	DeleteObject	Yes
Pen	CreatePen	DeleteObject	Yes
	CreatePenIndirect	DeleteObject	Yes
Regions	CreateEllipticRgn	DeleteObject	Yes
	CreateEllipticRgnIndirect	DeleteObject	Yes
	CreatePolygonRgn	DeleteObject	Yes
	CreatePolyPolygonRgn	DeleteObject	Yes
	CreateRectRgn	DeleteObject	Yes
	CreateRectRgnIndirect	DeleteObject	Yes
	CreateRoundRectRgn	DeleteObject	Yes
Resource	AllocResource	FreeResource	No
	FindResource	N/A	No
	Load Resource	FreeResource	No
	LockResource	UnlockResource	No
Sound	OpenSound	CloseSound	Yes
String	LoadString	N/A	No
Thunk	MakeProcInstance	FreeProcInstance	No
Timer	SetTimer	KillTimer	No
Window	CreateWindow	DestroyWindow	No
	CreateWindowEx	DestroyWindow	No

 * 位图资源在释放的时候必须从选中它的DC中脱离。

% 当菜单失去焦点和窗口不再关联或者应用程序结束的时候占用资源必须被释放。
@ DC被释放前必须和它关联（选中）的位图取消联系
# 如果脱字符指定了位图，位图必须被释放
& 对DeleteObject的调用不会销毁常规的StockObject（系统内定资源）

变量分配时会有两种情况，一个是在栈中分配，一个是在堆中分配。
在栈中分配的变量不用delete的，函数结束后自动释放;
在堆分配，也就是用malloc或new等分配的内存，要自己调用相应的free和delete释放。

DeleteObject( )这个函数经常会遇到，比如CPen 的DeleteObject，CDC的DeleteObject，CBitmap的DeleteObject。

这个DeleteObject函数是用来清除CBitmap ，CPen，CDC中选入的对象的。比如CBitmap用LoadBitmap载入的位图。CPen用CreatePen建出来的笔。
只有在DeleteObject清除这些对象中的对象数据之后才能选入其他的东西。只有DeleteOBject之后CBitmap对象才能调用LoadBitmap第二次载入位图，CPen对象才能第二次创建新画笔。  
当CDC不使用选入的对象时，都要用SelectObject选入旧的对象，这样刚才使用的那些对象都自由，这样就可以被释放了。
Delete CBitmap对象，Delete CPen对象才能把对象删除。