class BooleanField(Field): empty_strings_allowed = False default_error_messages = { 'invalid': _(u"'%s' value must be either True or Fals...
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其他好文 时间:
2014-11-08 07:02:30
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256
unit Unit1; //单元文件名
interface //这是接口关键字,用它来标识文件所调用的单元文件
uses //程序用到的公共单元 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Di...
之前一直在非64位机器下测试一切正常的程序,在iPhone5s下无缘无故崩溃。崩溃的位置是调用objc_msgSend时出现。经过一番辛苦搜索终于发现苹果官网上有一段这样的描述: Dispatch Objective-C Messages Using the ...
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其他好文 时间:
2014-11-05 17:42:54
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209
本实例主要用鼠标在窗体上绘图用到组件有TBevel、TRadioGroup、TButton组件运行效果如下:unit Unit1;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Fo....
开始使用这个: mount -t nfs 192.168.119.138:/root/work /share 报错: ?cat /var/log/messages | grep mount Nov ?4 15:16:09 air02 rpc.mountd[19139]: Caught signal 15, un-registering and exiting. Nov...
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其他好文 时间:
2014-11-04 20:03:06
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707
示例如下program Project1;uses Windows, Messages;{供 WM_LBUTTONDOWN 消息调用的自定义过程}procedure OnLButtonDown(h: HWND);var BrushHandle: HBRUSH; Rect: TRect;beg...
Advanced Message Queuing Protocol_AMQP The Advanced Message Queuing Protocol (AMQP) is an open standard for passing business messages between applications or organizations. ?It connects systems, ...
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其他好文 时间:
2014-11-03 16:37:06
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135
消息创建WM_CREATE:代码如下program Project1;uses Windows, Messages;{供 WM_PAINT 消息调用的自定义过程}procedure OnPaint(h: HWND);const str = '创建的窗口程序';var DC: HDC; ps:...
Object Oriented ProgrammingObjects send and receive messages(objects do things!)Objects send messagesMessages are-Composed by the sender-Interpreted b...
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编程语言 时间:
2014-11-01 23:04:53
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219
继续上节,我们还是用工程文件创建一个MDI窗口。代码如下:program MDIApp;uses Windows, Messages;var TheMessage:TMsg; FrameWindow,ClientWindow,ChildWindow:HWND;const IDCHILDWN...