什么是DC？(100分)

什么是DC？[]

数码相机(Digital Camera)、
直流电
。。。

destination canvas?

我想这楼主的意思应该不是“直流电”吧( Direct Currency)
看这版是 图形图像版
我斗胆猜一下： Device Context 设备上下文(直译)
作图都是这“里面”作的

简单无聊的回答: var DC: HDC;

DC:=GetDC(Canvas.Handle);

Form1.Canvas.方法A(参数1,参数2....)＝windows.方法A(DC,参数1,参数2....)

//前者是Canvas封装的API，后者是API，要说清楚就难了，看楼上的吧，呵呵，只可意会

OpenGl在创建RC时将于它将关联的
一个“设备描述表”（Device Context）.

没用过VC,API或WIN32ASM写过程序吧!看看M$对DC在解释：device context
Structure that defines a set of graphic objects and their attributes, and the graphic modes that affect output. In addition, the device context (DC) refers to a physical output device—its name, device driver, and other attributes. GDI function call parameters contain a handle to a DC to include the attributes of the specified device. There are four types of DC: display (supports drawing operations on a video display terminal), printer (supports drawing operations on a printer or plotter), memory (supports drawing operations on a bitmap), and information (supports retrieval of device data.)

设备上下文DC：是一种数据结构，定义了一系列的图形对象以及它们的相关属性和影响图形输出的图形模式。

图像设备描述表[]，今天愚人节[]